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ST Series User’s Manual
6-12
COMMUNICATION RATE
The COMMUNICATION RATE (baud rate) is the data communication speed, measured in bits per second
(bps), between the ST and PLC. Match the COMMUNICATION RATE values in both the PLC and ST.
Depending on the rate selected, certain PLCs may not be able to be used.
DATA LENGTH
For data communications, the DATA LENGTH must be set up as 7-bit or 8-bit data, and set up also the STOP
BIT as either a 1-bit or 2-bit value.
PARITY
Set up whether no parity check, or an odd or even number parity check will take place during communication.
CONTROL
Data flow CONTROL prevents the overflow of data sent back and forth. Select either X-CNTRL or ER-
CONTRL.
COMMUNICATION INTERFACE
These settings are used for data communication.
When using the ST400 unit, select either RS-422 (2-wire) or RS-422 (4-wire).
When using the ST401 unit, the data communication method is fixed at RS-232C. This setting cannot be
changed.
When using the ST402 unit, the PLC's protocol setting screen is displayed.
When using the ST403 unit, select one from RS-232C, RS-422 (2-wire) and RS-422 (4-wire).
SEE
GP-PRO/PBIII for Windows Device/PLC Connection Manual (included with the screen editor soft-
ware)
• When using an RS422 cable and the Memory Link format, be sure to select the 4-line option.
• If you have selected "Yes" for the [Serial I/F Switch] settings in the [Change Extend SIO Type]
command, in the Screen Editor's [Project] menu, be sure to select RS-232C.
SEE
GP-PRO/PBIII for Windows Device/PLC Connection Manual (included
with the screen editor software)