To Set The Communication Lock Parameter - Hitachi Abb Rvt Installation Und Betriebsanleitung

– Wait the required time to ensure all capacitors are discharged
– Connect the signal ground (if present) to GND
– Connect the twisted pair to the A and B connections
Insert the RS485 Modbus adapter in the controller
– Fix it with the appropriate screw
– Ensure that all connections are tight.
– If the RS485 Modbus adapter is one of the two ending station on the communication line put the load termination
switch in the 'ON 'position. If not, put it in the 'OFF 'position.
– Make sure all other Modbus stations (master and slaves) are properly connected
– Apply power on the controller
– Enter the MODBUS menu under:
– COMMUNICATION - I/O CONFIGURATION – COM. SETTINGS – MODBUS
• Choose a slave address (the address must be unused in the Modbus network it is inserted in)
• Select the right communication speed (baud rate)
• Select the right parity checking
• Select the right number of stop bits
– The Modbus slave is now ready to receive Modbus queries from the Modbus master and to send Modbus re-
sponse accordingly
– If something goes wrong, see the trouble shooting section hereafter

4.6. To set the COMMUNICATION LOCK parameter

If the RVT's parameters should be changed only from the Modbus network, set the Communication lock item as
locked. It can be found under the following menu:
COMMUNICATION - I/O CONFIGURATION – COM. SETTINGS
– Set the Communication lock parameter to 'Locked'
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