Modem Communications with the T1 and T2E/T2N

In Touch With Tomorrow

TOSHIBA INTERNATIONAL CORPORATION

Programmable Controllers

13131 West Little York Road

	Houston, TX 77041
PH. 800 231- 1412, 713-466-0277	FAX 713-466-8773
E-Mail	plc@tic.toshiba.com

MODEM COMMUNICATIONS WITH THE T1 AND T2E/T2N

March 1998

USING T-PDS WINDOWS FOR DIAL–UP COMMUNICATIONS WITH TOSHIBA T1 AND T2E/T2N PROGRAMMING PORT

Master Computer

T2E/T2N PLC

Modem

Telephone	RS232
Telephone
Line

Different

Ph. Numbers

Stored in T-PDS

Software

Telephone

Line

Modem
w/Null	T1/T1S PLC
Modem	T1/T1S PLC
Adapter
	RS232
	T1

Toshiba PLC users can expand their remote diagnostics and remote programming capabilities by using Hayes compatible modem communications over the Public Switched Telephone Network with standard analog phone lines and standard modems. Please note that “analog” line means a normal dial-in dial–out phone line similar to the ones that you have at home (i.e., about 48Vdc open circuit voltage with about 110Vac ring voltage). This does not include the digital phone lines in most offices that use modern digital PBX systems. Plugging a modem directly into one of these digital office lines may destroy the modem.

We used US Robotics 56K Sportster external modems for our tests, but just about any external Hayes compatible modem will work. Here is the list of equipment that you need for modem communications with the PLC’s programming ports:

Accessories For T2E/T2N Modem Communications (with programming port):

PC Side:

•a standard “straight-through” 9-25 pin RS-232 serial cable

•a ≥ 9600 baud external modem.

PLC Side:

•a standard “straight-through” 9-25 pin RS-232 serial cable

•a ≥ 9600 baud external modem.

See Note 1 on page 5