GT10/GT30
Connecting and Communicating with the PLC
64
4.9 Automatic Communication Settings Function
4.9 Automatic Communication Settings Function
After turning on the power supply, if there is no response from the PLC connected to
the GT10/GT30, the GT10/GT30 switches to the automatic setting mode for the
communication conditions. In the automatic setting mode, commands are sent to the
PLC while changing the communication conditions in the sequence shown below.
GT10
PLC
(1) 9600 bits/s, 8 bits, odd parity, 1 stop bit
(2) 19200 bits/s, 8 bits, odd parity, 1 stop bit
(3) 115200 bits/s, 8 bits, odd parity, 1 stop bit
(4) Communication conditions set in GTWIN Configuration Settings
If there is no response from the PLC,
commands are sent to the PLC while
changingthe communicationconditions.
The GT10/GT30, in automatic setting mode, continues to repeat steps (1) to (4) until
there is a responsefrom the PLC.While it is repeatingthese steps, it is in the “Standby”
mode under “GT10/GT30 Configuration” a “Communication Parameters” a “Handle
Communication Error” on GTWIN. For information on how settings are entered, please
refer to page 83 (GT10) and page 112 (GT30).
Explanation of this function
•
Conditions when the automatic settings mode is in effect
If communication is attempted the specified number of times and
there is no response from the PLC, the GT10/GT30 goes into the
automatic settings mode. The number of attempts is specified using
the “No. of Retries” parameter under “GT10/GT30 Configuration” →
“Communication Parameters” → “Handle Communication Error” on
GTWIN. For information on how settings are entered, please refer to
page 83 (GT10) and page 112 (GT30).
•
Automatically set communication conditions
In the automatic settings mode, if there is a response from the PLC,
subsequent communication is carried out under conditions matching
the response. The main unit configuration settings are not updated,
however, even if the communication parameters are different from
those of the main unit configuration settings.
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