Page 2
Accessories For T1 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 “null-modem” adapter such as Radio Shack’s 9-9 pin Null Modem
• a Toshiba part number TKRS232T1 T1 programming cable
• a ≥ 9600 baud external modem.
See Note 2 on page 5
Now that we have discussed the basic hardware requirements, let’s look at the parameter settings
in T-PDS and the PLCs. We will need to use the Computer Link connection when communicating
via modem, as the “Direct” connection will not work. T-PDS version 1.2 is used in this application
note; see the last page for more details. There are 3 Setup Steps:
STEP 1: CONFIGURE THE PLC
First, let’s set up the PLC’s Computer Link parameters. Go Online with the T1 or T2E/T2N using
the normal “Direct” method. We will need to open the System Parameters screen as shown below: