Want to force digital outputs through DR18.

I would like to refresh this topic as I am having a similar problem.

I am trying to use WP231 as a stand-alone WP231 unit and I want to force digital outputs through DR18.

In my WP231 module I configured (using Siwatool V7) digital outputs to be dependable on DR18 states. 

I tried something like this:

1-    i_CMD_CODE = 1                  920(40920)=1
bo_CMD_TRIGGER = TRUE        921(40921)=1

2- i_CMD_CODE = 2018               920(40920)=2018
bo_CMD_TRIGGER = TRUE         921(40921)=1

3-forcing digital outputs         1612(41612)=16#FFFF

4-  i_CMD_CODE = 4018            920(40920)=4018
bo_CMD_TRIGGER = TRUE      921(40921)=1

5-  i_CMD_CODE = 2                   920(40920)=2
bo_CMD_TRIGGER = TRUE       921(40921)=1

When I tried to execute those instructions step by step. I could observe that turning on and off service mode works fine, but writing (changing) data record DR18 is ignored.

Any suggestions ?

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Split from SIWAREX WP231 - CAN'T WRITE CALIBRATION VALUES USING MODBUS TCP/IP.