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Appendix A: Printer and RemoteTerminal Setup

Data from the Scanner can be printed using any one of the

following printers:

Snap-on MT1670 Scribe

SeikoDPU-411 Seiko DPU-414

In order for the Scanner to communicate with any of these

printers, the Snap-on printer cable (MT2500-400) must be

connected between the Scanner and the serial port on the

printer, and the Scanner baud rate must be set

appropriately (see sections below for details).

Refer to Communication SetupBaud Rate Setting on

page 33 for instructions on setting the Scanner baud rate.

Refer to Problems With Printer, Displays, and Other

Remote Terminals on page 45 for other printer-relatedproblems.

To set up a printer for Scanner communication:

1. Set the DIP switch positions for these printers as

explained in the following sections.

2. Turn the printer off then back on. Printers only read the

DIP switch positions when power is first turned on.

Snap-on MT1670 ScribeThe internal DIP switch for the Scribe must be set for

RS-232 communication and the Scanner baud rate must

be set to 2400. Set the external DIP switches as described in

Table 3 for communication with the Scanner:
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Seiko DPU-411The Seiko DPU-411 printer has two banks of DIP switches

on the bottom of the printer, an 8-switch bank (bank 1), and

a 6-switch bank (bank 2). The switches must be set for

RS-232 communication. Set the DIP switches as describedin Table 4 for communication with the Scanner.

Switches 4, 5, and 6 on switch bank 2 control the baud rate.

The settings above are for 9600 baud. See Table 5 for

alternate settings.

Table 3: DIP switch settings for Snap-on MT1670 Scribe

Switch No. Position Switch No. Position

1 On 6 Off

2 Off 7 Off

3* On or Off 8 On

4 On 9 On

5* On or Off 10 On

* Switches 3 and 5 do not affect Scanner and printer

communication. They may be left in their normal positions

for use with other Snap-on equipment.

Table 4: DIP switch settings for Seiko DPU-411

SWITCH BANK 1 SWITCH BANK 2

Switch No. Position Switch No. Position

1 Off 1 On

2 Off 2 On

3 On 3 On

4 On 4* Off

5 Off 5* Off

6 Off 6* Off

7 On

8 On

* These switches control the baud rate. See Table 5.

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Switches 5, 6, 7, and 8 on switch bank 3 control the baud

rate. The settings above are for 9600 baud. See Table 7

below for alternate settings.

Other Remote Terminal CommunicationThe Scanner can display data on a VT100 remote

terminal. This communication feature is designed to work

with equipment that operates in a VT100 format, which is a

common industry standard for terminal operation. If the

Scanner is used with a personal computer (PC), VT100

emulation software must be installed in the PC.

All remote terminal displays will be in the same format as the

four-line Scanner display screen except the data modes.

In these modes, the remote terminal can display a full screen

of data. The Movie function provides a similar display.

All Scanner operations can be controlled from the remoteterminal keyboard or from the Scanner. Using the

Scanner with a remote terminal requires an optional

terminal communication cable, which connects to the

RS-232 communication port on the top right of the

Scanner.

The VT100 terminal adapter cable (MT2500-500) for the

Scanner has a 25-pin (DB25) female connector. The

Scanner transmits data on pin 3 and receives data on

pin 2 at the DB25 connector. If the remote terminal

connector matches this arrangement, the VT100 cable can

be used. If it does not, an adapter (usually called a null

Table 7: DIP switch settings for baud rates 2400 and 4800

SWITCH BANK 3,

SWITCH NO.2400 BAUD 4800 BAUD

5 On On

6 Off Off

7 Off Off

8 On Off

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modem adapter) or a special cable may be required. Refer

to the installation manuals for specific equipment for

connector and cable information.

Terminal communication is most useful for displaying a full

screen of data in Codes & Data and similar diagnostic

modes (including movies). If the vehicle data list requires

more than four lines, the display can be scrolled with the

Scanner Thumbwheel or the keyboard arrow keys.Because more data is visible at one time for each data

frame, the update rate on the larger screen is slower than it

is on the Scanner display. The Scanner continues toreceive all data transmitted by the vehicle, however, and a

Scanner movie records every data frame for detailed

review.

Other diagnostic tests also can be made from the remote

terminal. Any Functional Test that requires the Y button to beheld down operates normally when controlled by the

Scanner Y button. However, it may not operate properlyfrom the remote terminal keyboard because the automaticrepeat function of the keyboard interrupts the continuous

signal from the Y button that is required for such tests.

If the Y button on the Scanner is pressed and releasedrapidly while operating in the VT100 mode, the beeper may

sound rapidly and test indications may fluctuate.

To connect the Scanner to the terminal and use thecommunication program:

1. Refer to the terminal manufacturers instructions for

information on baud rates and any required switch

settings or startup conditions for the terminal. The

communication parameters for a PC should be set to

N,8,1.

2. Set the Scanner at a baud rate that is compatible with

the terminal. Refer to Communication SetupBaudRate Setting on page 33 for details on setting the

Scanner baud rate.
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3. Connect the terminal communication cable to the

Scanner and to the terminal. The Scanner can be

connected to vehicle power and operating in any menuor test mode when the cable is connected.

4. Press the Y orN button or the up arrow or down arrowkey (s or t, or equivalent) on the terminal to start the

Scanner communication with the terminal.

5. Use either the Scanner controls or the terminal

keyboard to operate all Scanner functions. The Y andN keys on the keyboard correspond to the Y and N

buttons on the Scanner. The up arrow and downarrow keys on the keyboard correspond to the forward

and backward directions of the Thumbwheel.

6. On some keyboards, the arrow keys may be combined

with the number keys on a numeric keypad. Such

keyboards include a NUM LOCK key, which locks the

keys in the numerical condition. Be sure the NUM LOCK

key is unlocked, or off, so that the arrow keys act as the

Scanner Thumbwheel.

7. After completing operation of the Scanner with the

remote terminal, disconnect the Scanner from the

terminal. Then disconnect it from vehicle power to

remove it from the communication mode.

06 appendix a

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