Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 169
Program the Redundant Controller Chapter 7
In the example below, the GSV instruction is used to obtain the chassis ID (that
is, the chassis A or B designation) of the chassis that is functioning as the primary.
The
PhysicalChassisID value is stored in the PRIM_Chassis_ID_Now tag. The
PhysicalChassisID value retrieved matches the Chassis ID indicated in the
Controller Properties dialog box.
Figure 51 - GSV Instruction to Get Chassis ID
For more information about the REDUNDANCY object attributes, see
Appendix E
, Redundancy Object Attributes on page 273.
If the Physical Chassis ID value is Then the chassis ID is
0 Unknown
1Chassis A
2Chassis B
Chassis ID in Controller
Structured Text
Ladder Logic
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