Panasonic GTWIN Reference Manual page 28

GTWIN Reference Manual
Communication parameters
Field
COM Port
TOOL Port
Transmission Delay
Options for general purpose serial communication
GT Unit Number
COM Port
Options for Modbus RTU communication
PLC Unit Number
Description
Set the baud rate, data length, and parity bit. The stop bit is fixed at "1" by default.
Communication Error Handling (not available for general purpose serial
communication)
To define how to handle a communication error, click [Setup] to call up the
"Communication Error Handling" dialog.
Retry: number of retries in case of a communication error.
Wait: how long to wait between retries.
Display Error Code
 Select "Off" to not display error messages on the screen.
 Select "Yes (Hold)" to display error messages and hold them when power is turned
off.

Select "Yes (Unhold)" to display error messages but clear them when power is
turned off.
Set the baud rate and the parity bit. The data length and the stop bit value are
read-only and fixed at "8" and "1", respectively.
When the GT unit and any controller communicate with each other, they transfer data.
Basically the GT is the master and requests an answer; the controller/PLC replies.
Some circumstances may cause the GT unit to communicate faster than the controller
and information may be lost. Set a transmission delay to ensure that the GT responds
only after receiving all data from the PLC.
Specify the unit number of the GT connected to an external device (PLC).
Communication System
For some GT models, select either "RS232C/RS442 communication (full-duplex)" or
"RS485 communication (half-duplex)".
Specify the PLC unit number (1 - 247) connected to the GT unit that is to
communicate using Modbus RTU.
1.6 GT Configuration
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