Parameters (test operation, operation)
Parameters that must be adjusted for test operation and operation are as follows.
Number of communication retries
Communication check time interval
■Cautions during setting
Caution for setting the PU communication check time interval (Pr.122)
During adjustment or when communication with the PLC is not executed
When communication with the PLC is not executed
Set the communication time in the following cases.
• When it is necessary to monitor absence of communication for a certain
time and stop the inverter in such a case while communication with the PLC
is being executed continuously
• When it is necessary to stop the motor at the point when the PLC mode is
changed from RUNSTOP
Parameters (set as needed)
The table below shows parameters to be considered when using various system configurations and inverters.
For the method of use, refer to the V500 series inverter manual.
Communication EEPROM write
PLC Communication settings
For the FX5 communication settings of this function, parameters are set using GX Works3. For details about GX Works3, refer
to GX Works3 Operating Manual.
Setting of parameter differs according to the module used. The procedure for each module is as follows.
Built-in RS-485 port (CH1)
Navigation Window Parameter FX5UCPU Module Parameter 485 Serial Port
The following screen will be displayed if [Inverter Communication] is set for the communication protocol type.
Set the value shown on the left during adjustment, and set a value from 1 to
10 during operation.
Set the value shown on the left during adjustment, and set a value in
accordance with the system specification during operation.
1 to 9998
0 or 1
0: EEPROM is written.
1: RAM is written.
4 INVERTER COMMUNICATION
4.7 PLC Communication settings