I have a ViewMarq sign I am trying to send a modbus command string to at address 411000.
I can send values to other registers no problem, for example Numeric Variable 1 at 40100.
The tag value at 411000 changes when I send data over, it just doesn’t change the sign display. Other forum threads indicate the carriage return of \r needs to be included. It is included, and if I write to a modbus simulator with the same string I am seeing the x0D carriage return the ViewMarq is expecting.
Based on another thread in the forum I am using the following string:
s="<ID 0>Hello World" + “\n\r”
system.opc.writeValue(“Ignition OPC-UA Server”,"[Sign]HRS11000:200",s)
Based on Automation Direct tech support with the behavior it is not seeing the carriage return, otherwise it would update the display.