Changing a Modbus Address

U

Thread Starter

Uday

Dear Users,

I want to change the Modbus ID of L&T make Trivector meter (ER300P). Please suggest how it can be done.

Regards,
Uday
 
See this thread on the same topic:
https://control.com/forums/threads/modbus-rtu-slave-address-unknown.34490/#post-190781

Note the reply in post #5, which implies that the slave node (device) ID for the energy meter is configured via Modbus at register address (4)2385.

In the absence of the device's manual, all I can say is that the means to change the slave node ID address are typically

1. configured in firmware, using local pushbuttons and screen, or configuration software via USB/232
2. DIP or rotary switches
3. Modbus configured slave node ID, configuration by writing to a holding register. That requires knowing the default slave node register.

A power cycle to the device is frequently required for changes in serial comm parameters in order to force the device to recognize the change.

Chipkins' CAS Modbus master/client freeware Windows app has an slave address scanner, but you need to know that it is accessed from the main window's 'Discover' button, not in the 'Edit tasks' window. Using the app, the current slave node ID can be discovered.
https://store.chipkin.com/products/tools/cas-modbus-scanner
 
See this thread on the same topic:
https://control.com/forums/threads/modbus-rtu-slave-address-unknown.34490/#post-190781

Note the reply in post #5, which implies that the slave node (device) ID for the energy meter is configured via Modbus at register address (4)2385.

In the absence of the device's manual, all I can say is that the means to change the slave node ID address are typically

1. configured in firmware, using local pushbuttons and screen, or configuration software via USB/232
2. DIP or rotary switches
3. Modbus configured slave node ID, configuration by writing to a holding register. That requires knowing the default slave node register.

A power cycle to the device is frequently required for changes in serial comm parameters in order to force the device to recognize the change.

Chipkins' CAS Modbus master/client freeware Windows app has an slave address scanner, but you need to know that it is accessed from the main window's 'Discover' button, not in the 'Edit tasks' window. Using the app, the current slave node ID can be discovered.
https://store.chipkin.com/products/tools/cas-modbus-scanner
Thank you so much sir
 
Sometimes Modbus documentation is with the user manual. Sometimes the Modbus documentation is in a separate 'Communications' manual. It depends on the vendor.
 
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