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106 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Appendix A Get Diagnostic Status from Modules by Using Explicit Messaging
When the explicit message reads the data from the 1791ES-IB8XOBV4
module, the data appears in the MSGdata tags as shown in
Figure 38 .
Figure 38 - Instance 852 MSGdata Tags
The first 32 bits of the instance are in MSGdata[0].0…31, and the final 8 bits
are in MSGdata[1].0…7. These 40 bits must be mapped according to Instance
852. An easy method to do this mapping is to create a user-defined tag (UDT)
for Instance 852. Once complete, it appears as shown in
Figure 39 .
Figure 39 - Instance 852 UDT