p-cim opc communication

8/16/2019 P-CIM OPC Communication

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P-CIM OPC Communication

User Guide


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Afcon Software and Electroncis Ltd

P-CIM 7.70 OPC Communication User Guide I

Contents

About P CIM OPC Communications

P-CIM station............................................................................................................ 1

Requirements ............................................................................................................... 3

Settings .........................................................................................................................3

NetBEUI Protocol Configurations

Defining NetBEUI settings for Windows 2000.................................................. 3

Defining NetBEUI settings for XP ....................................................................... 4

DCOM Configuration Properties

DCOM Configuration Properties for Connecting to Remote OPC Servers ....... 4

From Section 2:.................................................................................................. 6

From Section 3:.................................................................................................. 7

Adding a user to a group ..........................................................................................7

OPC Browser

Workflow................................................................................................................ 10

Opening the OPC Browser ................................................................................ 11

Connecting the OPC Browser to an OPC server .............................................. 11

Connecting the OPC Browser to a remote OPC server ...................................12

OPC Browser Interface

Menu/Tool bar .................................................................................................. 14

Disconnecting/ Reconnecting/ Refreshing connections ............................... 16

Groups ............................................................................................................... 17

Items .................................................................................................................. 18

Adding an item to a group ................................................................................ 18

Adding an item manually ..................................................................................18

Removing an item from a group ...................................................................... 19

Removing an advised item used in another P-CIM module ...........................19


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P-CIM 7.70 OPC Communication User Guide II

Writing a new value to an advised item .......................................................... 19

Advising multiple items 2 ....................................................................................0

Options Menu......................................................................................................... 20

Monitoring, displaying advised items ..............................................................21

Displaying item syntax ...................................................................................... 22

Configuring OPC Browser Configuration ..........................................................22

Using the OPC Browser in a P-CIM Project................................................................ 25

Creating an object and adding OPC Browser syntax ......................................25

Creating datablocks.......................................................................................... 25

Displaying a P-CIM OPC item’s syntax in the OPC Browser ............................26

OPC Browser Alarm Summary Messages .............................................................26

P CIM OPC Gateway

Running the OPC Gateway ...............................................................................27

OPC Server Properties ......................................................................................28

The OPC Gateway Editor

Example – Defining an OPC Item in the OPC Gateway Editor ........................30Viewing OPC Items in a Client Interface .......................................................... 30

OPC Browser Troubleshooting ................................................................................... 32

General ................................................................................................................... 32

NO-SEK Stations .................................................................................................... 33


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P-CIM 7.70 OPC Communication User Guide 1

About P-CIM OPC Communications

OPC (OLE for Process Control) protocol is a set of interfaces that enable standardized data exchange

between automation/control applications, field devices and other types of applications.

P-CIM has two OPC modules:

• OPC Browser, an OPC client that requests information from an OPC server connected to a

PLC. The OPC Browser enables bidirectional communications between P-CIM and an OPC

server.

• OPC Gateway, an OPC server, that receives data from P-CIM OPC servers. Using OPC

protocol the data is translated and sent to the OPC client that sends it to external devices and

programs.

For more information about OPC technology, visit: www.OPCFoundation.org.

P-CIM station

A P-CIM station can act as both an OPC client and OPC server, or can be a client or server only. The

diagram below illustrates how a P-CIM station is both an OPC server and OPC client.

P-CIM Servers

BasicSrv DBSR PfwAlarm PfwDrvr TxtSrv

P-CIM OPC Gateway

External OPC clients

O P C P R O T O C O L

C A L L B A C K P R O T O C O L

OPC client (OPC Browser)

O P C P R O T O C O L

PLC OPC serverPLC

http://www.webopedia.com/TERM/D/client_server_architecture.htmlhttp://www.webopedia.com/TERM/D/client_server_architecture.htmlhttp://www.opcfoundation.org/http://www.opcfoundation.org/http://www.webopedia.com/TERM/D/client_server_architecture.html


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The P-CIM OPC client (Browser) receives data from the server, whereas the P-CIM OPC server

(Gateway) sends P-CIM data to any OPC client.

In this bidirectional process, data from the PLC arrives to the OPC server.The data is translated using

OPC protocol, and sent to the OPC client (Browser). The data is then sent to P-CIM servers and using

call back protocol..

The data sent to the OPC Gateway( Gateway) where it is translated using OPC protocol and sent to

external programs.


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Requirements

Settings

The following must be defined on the station using OPC communications:

• NetBEUI protocol

• DCOM

• Adding Users to a group

NetBEUI Protocol Configurations

NetBEUI (Network Basic Input Output System) protocol is required for configuring a network of 20 to

200 stations without requiring a router for a different subnet mask.

NetBEUI, is an API that enhances the DOS BIOS with additional functionalities for LANS.

Defining NetBEUI settings for Windows 2000

1. Copy the NetBEUI files from the Windows XP CD. Instructions can be found at: http://support.microsoft.com by searching for NetBEUI and selecting How to install NetBEUI on

Windows XP.

2. Select the following: Start/ Settings/ Control Panel/ Network/ Dialup Connections.

3. Right click Local Area Connection and then click the Properties button.

4. Scroll the list, select NetBEUI protocol and then click the Install button.

Operating System• Windows 2000 Professional/Server

• Windows XP Professional

• Windows 2003 Server

Protocols Net BEUI, TCP/IP

To run the OPC Browser P-CIM version 7.50 and up

To run the OPC Gateway P-CIM version 7.50 and up

Windows XP , 2000 & 2003 serevr are required for remote OPC server connections.


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5. Select the relevant protocol and click OK to confirm.

Defining NetBEUI settings for XP

1. Open the Network dialog box, Select the following: Start/ Settings/ Control Panel/ Network.

2. Open the Protocol tab, and click the Add button to open the Select Network Protocol dialog box.

3. Select the NetBEUI Protocol option and click OK.

DCOM Configuration Properties

DCOM technology can be used to transparently send/receive information between COM components

(for example, clients and servers) on the same network.

• DCOM configuration is only required for accessing remote OPC servers.

• DCOM configuration is not required when both the client and the server reside on the same

computer DCOM configuration is not required.

DCOM Configuration Properties for Connecting to Remote OPC Servers

1. Select Start/ Run to open the Run dialog box.

2. Type dcomcnfg into the Open field and click OK. The DCOM Configuration Properties dialog

box is displayed.

3. Select: Components Services/ Computers/ My Computer/ DCOM Config.

4. From the Components Services list, right click PfwOPCGateway to open the PfwOPCGateway

Properties dialog box.


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5. Click the Identify tab and select the interactive user and system options.

6. Click Apply.

7. Click the Security tab.

8. Select Customize.

9. Click the Edit button to open the Launch Permission dialog box.


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From Section 1:

1. Check the Customize option and then click the Edit button. The Registry Value Permissions

dialog box opens.

2. Click the Add button to display the Add Users and Groups dialog box.

3. Select the user/group that will be able to access the OPC server.

4. From the Permissions for Administrators field, select Allow Access

5. Click OK and OK again, to return to the Security tab.


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From Section 2:

1. Check the Customize option from the Access Permissions option and then click the Edit

button. The Registry Value Permissions dialog box opens

2. Select the user/group that will be able to launch the OPC server.

3. From the Type of Access field, select Allow Access. 4. Click OK to return to the Security tab.

From Section 3:

1. Check the Customize option from the Configuration Permissions option and then click the

Edit button. The Registry Value Permissions dialog box opens.

2. Select the user/group that has permission to access the OPC server.

3. From the Type of Access field, select Full Control.

4. Click OK to return to the Security tab.

5. Click OK and OK again to save these definitions and to exit the Properties dialog box.

Adding a user to a group

When users are assigned to groups, they receive the group’s authorization privileges.

1. Select the following: Start/ Settings/ Control Panel/ Administrative Tools/ Computer

Management/ Local User and Groups.

2. Double click Groups to select the group’s users.


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3. Double click a user to open the Users Properties dialog box.

4. Select a user and then click the Add button to open the Select Users or Groups dialog box.


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5. Enter the name of the user and then click the Check Names button to add the user’s details

OR

Double click the name of the user and click the Add button.The user’s name is added to the list.

Connecting to a remote OPC gateway in a workgroup configuration

In order to connect to a remote OPC gateway in a workgroup network configuration, a peer-to-peer

connection must be established between the client and server computers. The following changes

should be made to the Local Security Policy (on Windows 2003 Server and Windows XP Service

Pack 2 only):

1. Open the Windows Control Panel and access the Administrative Tools group.

2. Double-click the Local Security Policy icon.

3. Select on the Security Options folder.

4. On the right-hand window, double-click the “Network Access: Let Everyone Permissions Apply to

Anonymous Users” entry.

5. Select the Enabled option and click OK to apply the new settings.


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6. To enable sharing folders between computers in the workgroup, locate the following entry in the

Local Security Policy window: Network Access: Sharing and Security model for Local

Accounts.

7. Double-click the entry to change the current policy.

8. From the pull-down menu select the following option: Classic - local users authenticate as them-

selves.


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OPC Browser

The OPC Browser module can be used in a P-CIM project to access process data from an OPC

server.

During runtime, the OPC Browser receives data from the PLC after it has been processed by the OPCserver software, and then the OPC Browser sends the information to the P-CIM project.

OPC technology enables the following actions:

• Connection/disconnection/reconnection between the OPC Browser to more than one OPC

server both locally and remotely (as of P-CIM version 7.02).

• Adding groups and adding items to groups.

• Reading/ writing item values.

• Monitoring advised items.

• Checking advised item’s status.

• Checking communications.

The following diagram displays how the OPC Browser can be used in a P-CIM project.

Workflow

The following workflow can be used for working with the OPC Browser:

The protocol used by the PLC must match the protocol used by the OPC server.

The OPC Browser can be opened without starting up P-CIM. However, P-CIM must be

running to enable connection to the OPC Gateway server.

PLC protocol OPC protocol P-CIM callback

PLC P-CIM OPC Browser P-CIM projectP-CIM OPC Server


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Opening the OPC Browser

From the Tools menu of the P-CIM icons group,click the P-CIM OPC Browser icon

Connecting the OPC Browser to an OPC server

1. Open the Connect dialog box: From the OPC Browser interface, click the Connect icon

or ,

From the Server menu click the Connect option.

Connect the OPC Browser to the OPC Server.

In the OPC Browser, create a group and define group properties.

Add items to the group.

Activate the Option menu functions.


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2. In the Connect dialog box double click an OPC server ,

or select an OPC server and then click the Connect button.

3. The OPC Browser is connected to the OPC server and the OPC Browser interface opens.

Connecting the OPC Browser to a remote OPC server

1. Open the Connect dialog box: In the OPC Browser interface click the Connect icon

or from the Server menu click the Connect option.

2. Click the Network OPC Servers button and browse for the computer where the remote OPC

server is installed.

3. Click OK to make the connection between the servers. The OPC servers available on the remote

computer are added to the list of OPC servers in the Connect dialog box, and the name of theremote computer is added to the Network Computer field.

The OPC Server Key

field is automatically filled afteran OPC server is selectedfrom the list.


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4. Select a remote OPC server and then click the Connect button to connect between the selected

OPC server and the OPC Browser.

OPC Browser Interface

When first accessed the OPC Browser has the following sections:

The INI file name of the remote OPC server has the following format:

OPC_NetworkComputerName_OPCServerName.ini

The computer names ofremote OPC servers havebackslashes \\ asprefixes.

When making remote OPC server connections, check that you have the appropriate authorization.Error! Reference source not found., page 8 for more information. Both local and remote computersmust be defined on the same domain or in the same workgroup.


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Menu/Tool bar

The OPC Browser menu bar is dynamic, after a connection has been made to an OPC server

additional menus and options are available. An asterisk * next to a menu/option indicates that it is

available both when the OPC Browser is online or offline.

Section Description

Menu bar See Menu bar on page 14.

Toolbar See Toolbar on page 14.

Address bar Displays the full name and address of the item currently selected in the OPC

Browser.

Server window Displays the OPC server group tree structure. When expanded the tree has

the following structure:

Server name, Group name, Sub-group name

Group window Displays the properties of a selected OPC Browser group:

• Group name, which is the name identifying the group.

• Update rate, which specifies the frequency (in milliseconds) that the

OPC server sends updated data. • Percent deadband, specifiying the percent change of the scale

required before notifying the OPC Browser of the data changes. The

percent deadband is defined for the item in the OPC server

Deadband default = 0.

See Groups on page 17.

Items window Displays the items of the selected group or sub-group in the Server window

from which items can be added into the list of advised items.

Advised items window Displays selected items from the Items list. When monitoring is defined,

these items are scanned according to predefined conditions.

Table 1: OPC Browser Menu/Tool b ar

Menu Icon Option Description

File Save Saves the OPC Browser groups and items.

*Exit Exits the OPC Browser module.


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Server *Connect Opens the OPC servers Connect dialog box where the

connection between the OPC Browser and a selected OPC

server are made.

Disconnect Ends communications between the OPC Browser and theselected OPC server.

Refresh When clicked, the OPC Browser reads the items from the tree of

the selected OPC server again and updates the OPC Browser

window.

Reconnect Reconnects the OPC Browser to the OPC server after

communication failure. This option is only available when

automatic reconnection is disabled in the Keep Alive dialog

box See page 23.

Disconnect allservers

Disconnects all open servers and displays the OPC Browser window with the basic menu bar options and toolbar Connect

icon.

Show Items When connected to an OPC server, select this option to expend

the items tree.

Server

Properties

Shows the OPC Server properties. Server specific settings are

modified from this location.

*Item Add group Opens the Group Parameters dialog box. OPC Browser groupsand their properties are displayed in the Group Window of the

OPC Browser interface. See Groups on page 17.

Remove group Removes a selected group from the Group Window.

Add item Opens the Add Item dialog box where items that require

constant monitioring are defined.

Remove item Removes a selected item from the Advised Items list.

Write item Opens the Writing dialog box whereyou can modify the selected

advised item’s value.

Add multiple

items

Opens the Multiple Advise dialog box where you can define

batches of items that require constant monitoring.

An advised item is an item that is constantly monitored by the

P-CIM client modules. For example, Operator Worksation.

View *Status bar Toggles the Status bar where the total number of advised items

and the total number of items in a selected group are displayed.

Address bar Toggles the address bar. The information in the address bar can

be copied and added to objects during project development.

Table 1: OPC Browser Menu/Tool b (Continued)ar

http://-/?-http://-/?-


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Disconnecting/ Reconnecting/ Refreshing connections

• Disconnecting:

• Disconnecting a single OPC server :select the OPC server from the Server window and

from the toolbar click the Disconnect icon

or from the Server menu select the Disconnect option.

• Disconnect all OPC servers connected to the OPC Browser : select the Disconnect

All option from the Server menu.

• Reconnecting:To reconnect to the OPC server that was last disconnected, click the

Reconnect icon from the toolbar

or from the Server menu select the Reconnect option.

• Refreshing: The OPC Browser with items and their values that were added/ removed

to/ from the selected OPC server, click the Refresh icon

or from the Server menu select the Refresh option.

Options Monitoring When activated, displays updated values of advised items.

P-CIM itemsyntax

When activated, displays the Server| Topic| defined for the itemin the OPC server Item syntax of a selected item (or advised

item) in the interface’s Address bar.

*OPC Browser

configuration

Opens the Browser Configuration dialog box where connection

settings can be defined.

When the Monitoring option is selected, data is transferred between the OPC Browser and the

OPC server. Advised items and their details are displayed in the Advised Items window. This

process requires extensive CPU memory resources. We recommend using this option only when

absolutely required.From Version P-CIM 7.50 the OPC browser is capable of supporting EGU conversion functions:

bcd, byte, nib and alarm. To use these functions add the character d before each function. For

example: dbcd, dbyte.

An OPC server that has items that are advised (by the Operator Workstation, DBSR or other

modules), cannot be disconnected until their items become unadvised

If the OPC server has advised items and you wish to disconnect; shutdown P-CIM and then

restart the application.

All connected OPC servers are automatically disconnected when P-CIM is shutdown.

Table 1: OPC Browser Menu/Tool b (Continued)ar


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Groups

Groups with any number of items can be created where each group has global parameters specific to

the group. This option increases efficiency in a P-CIM project.

An advised item is processed in the OPC Browser, after it has been added, and results are displayed

in the Advised Items window. A list of all OPC Browser groups is displayed in the Groups window.

• Adding a new group

Groups are created/ modified in the Group dialog box. To open this dialog box either right click in the

Servers window or from the Items menu select the Add Group option.

The Group Properties dialog box has the following fields:

Field Description

Name Group name.

Update rate Indicating the frequency that the group of advised items is scanned. For example, if

1000 msec is defined the group is scanned every 1000 msec.

Deadband Specifying the required percentage of change in the scale defined for the item in the

OPC server before notifying the OPC Browser of the data changes.

Deadband default = 0.

Time Bias Indicates the time zone where the data was collected. Time Bias indicates the time

difference between the server and the client. By default= -120


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• Removing groups from the Groups window

Select the group and then either right click and select Remove Group or, from the Items menu select

the Remove Group option.

• Modifying group properties

Group properties are defined in the Group Properties dialog box.

To open this dialog box either, select a group and then right click and select Group Properties or,

from the Items menu select Group Properties.

Items

Items can be advised and added to groups. All items that are defined in the application are displayed in

the OPC Items window. When an item is added to a group it becomes an advised item and is displayed

in the Advised Items window.

Adding an item to a group

On first connection to the OPc server, the items tree is not visible.

2. To display the items list, right-click the OPC Server name and choose Show Items from the

menu.

3. In the Server window tree, select a branch and then select a group.

4. Select an item from the OPC Items window and then right click on the item and select the Add

Item option or

From the Items menu double click on the item, select the Add Item option.

Adding an item manuallyThis option is used to add an item that does not appear in the OPC Items window, but is supported by

the OPC server.

1. In the Server window tree, select a branch and then select a group.

2. From the OPC Items List window, right click and select Add Item.The Add Item dialog box is

displayed.

The OPC Browser has a default group named Root that cannot be deleted.

Since the OPC Browser is used for test purposes, not all OPC items need to be added to

the Advised window.


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3. Complete the Item field:

• If you know the item Name and Path select the Name button and then type in this

information.

• If you do not know the full path, type in the name of the item and then check the Full Path

option to complete the location.

4. Click the Add Item button to add the selected item to the Advised Items window.

5. The Copy button can be used to copy the item and its path into another location.

Removing an item from a group

1. From the Group window, select a group.

2. From the Advised Items window select the advised item.

• On your keyboard, press the Delete button.

• Right click and select the Remove Item option.

• From the Items menu, select the Remove option.

Removing an advised item used in another P-CIM module

If you wish to remove an advised item used in Operator Workstation or another P-CIM module.

1. In the other module,change the status of the selected item to not advised. (for example, by

closing the display).

2. Remove the advised item from the OPC Browser.

Writing a new value to an advised item

This option is used to manually update values during runtime.

1. From the Groups window select a group and from the Server window select an advised item.

2. Open the Writing dialog box, right click and select the Write Value option

or in the Items menu select the Write option.

Data blocks must first be deleted from the Database Editor before they are removed from the

OPC Browser


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3. Modify the value in the New Value field.

4. Click OK to confirm the new definitions and to exit this dialog box.

Advising multiple items

This option enables advising items in bulk quantity of up to 3000 items per batch.

Multiple items can be added to the monitored list in one of the following ways:

• To add items from a specific location in a set quantity

1. From the Items window select the relevant items.

2. On your keyboard, press the Shift button.

3. Double click to add the items to the monitored list

or right click and select the Add Items option.

4. The items are added to the monitored list.

• To add a Sequential List

• From the Groups window select a group and then in the OPC Items window select the first itemfrom which to create multiple advised items.

5. From the Items menu select the Multiple Advised option. The Add Multiple Items dialog

box opens, and the From field displays the name of the selected item.

6. Type in the number of items into the Amount field.

If,for example, 70 is entered, the selected item and 70 items after it are added to the

Advised Items window.

7. Click OK to save this definition and to exit this dialog box.

Options Menu

This menu has the following options:

• Monitoring

• P-CIM item syntax

• OPC Browser Configuration

Values can also be updated manually in the Operator Workstation module.


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Monitoring, displaying advised items

1. From the Options menu select the Monitoring option

or in the toolbar click the Monitoring button.

The Advised Items list is displayed with the following columns:

Table 2: OPC Browser Options Menu

Column Description

Item name Displays the full name and location of the item.

Value Displays the value of the item in the OPC server.

Data type Displays the item’s data type as defined in the OPC server. For example, word,

double word.

Time Stamp Displays the time of the last update of the item by the OPC Browser.

Column Description

Quality Each OPC item’s value has an indication of its quality. This is known as the OPC

Item Quality. The quality of an item is based on whether or not the physical device

has provided a value for the Item ID.

Quality status can be:

• Good, indicating that a value has been sent by the physical device for the

OPC item.

• Bad, indicating that a value has not yet been received for the OPC item and

the value is unknown.

Access Defines if this item is read only or read and write.


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Displaying item syntax

In the Options menu select the P-CIM Item Syntax option. The full Server|Topic!Item syntax of the

item is displayed in the Address bar.

Configuring OPC Browser Configuration

This option is used to define the OPC Browser settings.

From the Options menu:

1. Select the OPC Browser Configuration option. The General tab is displayed.

The OPC Browser Configuration dialog box has the following fields:

When the Monitoring option is selected, data is transferred between the OPC Browser and the

OPC server. Advised items and their details are displayed in the Advised Items window. This

process uses extensive CPU memory resources. Afcom recommends using this option only

when necessary.


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2. Click the Keep Alive tab.

This dialog box is used to define the continual communication of OPC servers connected to the OPC

Browser. It has the following fields:

Table 3: OPC Browser Configuration

Field Description

Connectionsettings Timeout Defines the maximum/minimum amount of time waited toconnect to the OPC server and to receive a list of items from

it.

Data change rate Defines the interval for scanning updated OPC server

advised items.

Logging

options

Log … Alarm

Handler

When checked, indicates that advised items from the

callback server are written to and displayed in the Alarm

Handler.

Log…(0-2) Indicates whether (or not) the advised item is logged:

0 = not logged

1 = logged

2 = internal use only

Field Description

Communication

… (10-36000)

Indicates the time interval between each communication test.

Communication

test attempts

Indicates the number of communication test attempts.


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Time … attempts Indicates the number of seconds between each reconnect communication

attempt.

When 0 is defined this indicates that reconnection to an OPC server can be made

manually by clicking the Reconnect button.


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Using the OPC Browser in a P-CIM Project

When developing a project, an object whose data is processed through the OPC Browser and OPC

servers must have syntax assigned. As in all P-CIM modules, the syntax used in the OPC Browser is

built from Server|Topic!Item elements, where:

• Server = OPCSrv

• Topic = OPC server name

• Item = Itemname

Creating an object and adding OPC Browser syntax

The Animation Editor is used to develop the graphical display of a P-CIM project. During runtime, the

display is shown in the Operator Workstation on the operator’s station, and acts as an interface

between the operator and the factory floor.

1. From the P-CIM Group, click the Animation Editor icon to access the Animation Editor.

2. Create or select an object in a display

3. Double click the object

or right click the object and select the Properties option.

4. The Properties dialog box is displayed.

The example below displays the Server|Topic!Item of an object that has input properties.

Creating datablocks

Data blocks are generally defined for generating alarms and history collection.

From the P-CIM Group, double click the Database Editor icon to access the Database Editor. The

example below displays the AV1 data block.

The following syntax can be used to advise items per group: groupname(itemname)

For example, Group 1 will have the following syntax: Group1(DBSR.P-CIM.$WDAY)


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Displaying a P-CIM OPC item’s syntax in the OPC Browser

From the View menu, select the Address bar option to display the address bar.

From the Items window click an item.

For example, when A1 is selected in the Items window, the following syntax is displayed in the Address

bar.

Where:

• Server = OPCSrv

• Topic = PFWOPCGateway.Server

• Item = DBSR.PCIM.A1

OPC Browser Alarm Summary Messages

Activity in the OPC Browser is viewed in the Alarm Summary window. Messages can be generated for:

• Successful/ failed OPC server connection.

• OPC server disconnection/ reconnection from the OPC Browser.

• Success/failure to advise items.

• OPC Browser loader successfully.

• OPC Browser receives a request to close.

• OPC Browser successfully closed.

The Database Editor can only be fully accessed when P-CIM is running.

OPCsrv|PFWOPCGateway.Server!DBSR.PCIM.A1


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P-CIM OPC Gateway

The P-CIM OPC Gateway is a P-CIM OPC server program that runs in P-CIM. It can be connected to

any OPC client.

The function of the OPC Gateway is to send data from P-CIM servers to external OPC client programsvia OPC protocol. Once an OPC client is connected to the OPC Gateway, the Gateway runs

automatically, bringing data from the following P-CIM servers:

• BasicSrv

• DBSR

• PfwAlarm

• PFWDrvr

• TxtSrv

The diagram below illustrates how data is received from P-CIM servers, translated by callback protocol

and sent to the OPC Gateway.

The data is then translated by OPC protocol and sent to external OPC clients. This is a bidirectional

process.

Running the OPC Gateway

During runtime, when an OPC client is connected, the OPC Gateway runs automatically and

the OPC Gateway icon is displayed in the traybar as an indicator.

OPC item settings can be updated during runtime, If you wish to define new items or settings before

the OPC client runs, open the Gateway manually.

To open the Gateway manually: From the P-CIM Runtime icons group double click the OPCGateway Editor icon.


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OPC Server Properties

Open the OPC Browser and from the Server menu select the PfwOPCGateway Server Properties

option.

When P-CIM is not running, it is automatically started up if the OPC Gateway icon is double clicked in

the P-CIM Group. Right clicking the OPC Gateway traybar icon displays three options:

• About: when clicked displays details about P-CIM and the OPC Gateway.

• Edit: when clicked displays the P-CIM OPC Gateway Editor.

• Shutdown: when clicked shutsdown the OPC Gateway server.

The OPC Gateway Editor

The P-CIM OPC Gateway Editor enables definition of:

Field Description

Synchronous

Read

When enabled the OPC Browser polls the OPC Gateway for advised items every

60 seconds using synchronous read..

Synchronous

Write

When checked enables the OPC Browser to write advised items values in

synchronous connection.

Case Sensitive To enable usage of the case sensitive function,Case Sensitive check box.

Communication

test interval

Defines the time interval between each communication test. Default = 30 seconds.

Range: 10-36000 seconds.

Communciation

test attempts

Defines the number of communication attempts that will be made by the OPC

Browser until failed. Default = 3 attempts. Range: 1-100

Time between

reconnect

attempts

Time interval between reconnection attempts. Default = 60 seconds.


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• Address names and settings.

• An item’s Read/Write/Read and Write access permission.

• An item’s data type.

To access OPC Gateway Editor dialog box: From the traybar right click the OPC Gateway icon and

select the Edit option.

This dialog box has the following fields:

Table 4: OPC Gateway Properties

Field Description

Name Where the name of a new item is defined.

Server Indicating the type of P-CIM server used, which can be: BasicSrv, DBSR,

PfwAlarm, PfwDrvr or TxtSrv.

Note: The BasicSrv, PfwDrvr, and TxtSrv.servers items can only be assigned to

OPC items in the P-CIM OPC Gateway Editor dialog box.

Topic Indicating the name of the DDE format topic, which is always Pcim.

Item Indicating the item’s address in DDE format.

Data type Indicating the type of data block. The following block types are available:Boolean, byte, double, float, long, short and string.

Access Indicating whether the item is Read, Write or Read and Write in the OPC client.

Table Listing all item addresses and their settings.

Add When clicked adds a new item to the Items table.

Delete When clicked deletes a selected item from the Items table.

Change When clicked updates a modified item in the Items table.

Save When clicked saves the settings in the OPC Gateway.

Close When clicked shuts down the OPC Gateway Editor.


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Example – Defining an OPC Item in the OPC Gateway Editor

1. Open the OPC Gateway Editor dialog box.

2. Complete the dialog box fields using the information in the table above

t

3. Click the Save button to confirm these settings.

4. To view/ read/ write the OPC item, connect the OPC client to the OPC Gateway.

Viewing OPC Items in a Client Interface

In the OPC client Connect field, select and enter the PfwOPCGateway.Server key to the connect

between the client and the OPC server.

OPC items are displayed in an Items tree such as the one below:

Field Settings

Name Item 1

Server DBSR

Topic Pcim

Item D:1

Data type Boolean

Access Read

If the OPC client is already connected it may need refreshing manually when new items are

added.Other OPC clients are automatically updated.


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Branch Containing

PfwOPCGateway.Server Indicates which OPC key is used to reference the OPC server. This

name is automatically displayed in the Servers List in the client.

DBSR This branch holds P-CIM Database Server items.

PfwAlarm This branch holds P-CIM Alarm Server items

The PfwAlarm branch is only displayed when the Advanced Alarm

Handler module is open and if items have been defined in it.

User This branch is a container for the OPC items defined in the OPCGateway Editor.


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OPC Browser Troubleshooting

General

The OPC Browser fails to advise items.

Possible Cause: Upper Case Sensitivity in OPC Servers

This situation could occur because the OPC server is case sensitive. The following definitions must be

set when working with an OPC server that is case sensitive:

File: OPC server name Section: General Token: Uppercase = 0

The OPC Browser fails to connect to the OPC server,or connects but does not

display the OPC tree..

Possible Cause: Single Thread Connections to OPC Servers

The OPC server is connected via a single-thread connections (and not via multi-thread connections).

The following definitions must be set when connecting to an OPC server in a single-thread connection:

File: OPCSRV.INI Section:[MainThreadConnection]NameSrvN= Token: OPCserver name

Connection Failure Error Message

A connection failure error message may be displayed when the OPC Browser connects to an OPC

server, even though the connection is successful.

To avoid this message the following definitions must be set:

File: OPCSRV.INI Section:[IgnoreConnectError]NameSrvN= Token: OPCserver name

Problems with Remote Connections

If you have problems with remote connection, check the OPC server’s DCOM settings. During server

startup the DCOM settings may be overwritten.

IAfcom recommends that you contact the manufacturer of the server.

The file name is the name of the OPC server.

To date, this is a problem only for an Rslinx OPC on a local PC.

To date, this is a problem only for an Rslinx OPC on a local PC.


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NO-SEK Stations

P-CIM No-SEK station is able to connect to a remote OPC server only if the P-CIM Master node is

equipped with a site License and Unlimited IO SEK support.

From a NO-SEK node, the OPC Browser will only be able to connect to a remote OPC server which

resides on the P-CIM-Master station.

Message Description

P-CIM OPC Browser cannot

connect to local OPC server

when no SEK is attached

The OPC Browser cannot connect to the local OPC

server(s) while running on a Non-SEK station


connect to remote OPC server -

Master SEK is IO limited.

OPC Browser cannot connect to remote OPC servers when

the remote Master is a limited IO SEK.


connect to remote OPC server -

Master sites limitation.

OPC Browser is unable connect to remote OPC servers

when the Master nodes threshold has been reached. The

"Connect" dialog box the "Network OPC Servers" button

isdisabled.


connect to remote OPC server –

remote IP address is not equal to

P-CIM Master IP

The network OPC gateway is not reachable or the IP

address is incorrect


connect to remote OPC server –

invalid IP address syntax

An incorrect P-CIM Master IP or it does not exists.

p-cim opc communication

Documents