ViewMarq Carriage Return Modbus Command String

Ignition
1

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.

2

Have you tried reversing the order of the carriage return and new line?

i.e. s="Hello world\r\n"

1 Like
3

Consider omitting the “\n”, or placing it after the “\r”.

4

I’ve tried \r\n, \n\r, \r\r, more than 2 \r’s and doubling up on both orders of \n\r and \r\n with no luck.

I’m going through the various byte/word swapping configurations to see if I can have any luck there, but the tag value is coming across correctly in the tag browser so it seems like everything should be good to go there.