6–10
Chapter 6 – Initializing the GLC
GLC2300 Series User Manual
CONTROL
The
CONTROL
setting prevents the overflow of data transmitted and received.
Select either the XON/XOFF or the ER (DTR) control.
COMMUNICATION FORMAT
Select one of the following options for the Communication Format setting:
• RS-232C
• RS-422 (4-line)
• RS-422 (2-line)
•
When using an RS-422 cable and the Memory Link format,
be sure to select the 4-line option.
GP-PRO/PB III for Windows Device/PLC Connec-
tion Manual
(included with the GP-PRO/PB III C-Package)
•
If you have selected "YES" for the [SERIAL I/F CHANGE] on
the [COMMUNICATION PORT SETUP] screen, or "Yes" for
the [Serial I/F Switch] settings in the [Change Extend SIO Type]
command, in the GP Screen Editor's [Project] menu, be sure
to select RS-232C.
6.4.2 COMMUNICATION SETUP
This section explains how to use the Retry command to deal with errors, including
those that occur during GLC and PLC communication.
RECEIVE TIMEOUT (1 to 127)
Use a numeric value to set a period of time in which the GLC receives data from
the PLC. If the cable is not connected, data communication will Timeout after one
second, regardless of this setting’s value.
The default value for the RECEIVE TIMEOUT setting is 10 seconds.
An error message may appear on your personal computer if:
•
You transfer screens from your PC to the GLC after a PLC
communication error has occurred and the error is not yet
cleared.
•
Your GLC unit’s RECEIVE TIMEOUT value is set to 30
seconds or more.
