ABB RS485 - To Set the COMMUNICATION LOCK Parameter; To Test the Communication

RS485  RS485 Modbus adapter - 13
o 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 response 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:
o COMMUNICATION - I/O CONFIGURATION – COM. SETTINGS
 Set the Communication lock parameter to ‘Locked’
4.7 To test the communication
Depending on the way the controller is connected to the Modbus network, different ways
of testing may be chosen.
The user can find much application on the internet to scan Modbus devices and test
communication.
In case of problem, please refer to the troubleshooting paragraph.