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M580 Hot Standby CPU DDT Diagnostics

Title
M580 Hot Standby CPU DDT Diagnostics
 
Issue
M580 Hot Standby CPU DDT Diagnostics
 
Product Line
M580
 
Environment
Unity Pro
 
Cause
N/A
 
Resolution
The Hot Standby DDT Data Structure has bools available to determine if the Primary or Standby is running or if PLC has failed.
The Hot Standby DDT Data Structure - The T_M_ECPU_HSBY DDT is the exclusive interface between the M580 Hot Standby system and the application running in a BMEH58•040 CPU.
The DDT instance should appear as: ECPU_HSBY_1. There are several elements that give you system information
 The M580 Hot Standby T_M_ECPU_HSBY_STS Data Type presents the following elements under the LOCAL_HSBY_STS and REMOTE_HSBY_STS:

RUN_PRIMARY
True: The PAC is in primary state.
False: The PAC is in standby, wait or stop state.

RUN_STANDBY
True: The PAC is in standby state.
False: The PAC is in primary, wait or stop state.
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