Function Blocks
RSTAT Redundancy Status Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 325
2/07
RSTAT Redundancy Status Function Block
Description
The
RSTAT label stands for Redundancy Status. This block is part of the Alarms/Monitors category.
Function
Used with redundant CPUs only, such as C70R. The output pins indicate the lead/reserve status of CPU A
and CPU B. The input can force a failover between CPUs.
Inputs
^FOVER
– OFF-to-ON transition causes a manual failover between CPUs if a Reserve CPU is online and
available.
Outputs
A LEAD
– ON when CPU A is the Lead, else OFF.
B LEAD – ON when CPU B is the Lead, else OFF.
A RSRV – ON when CPU A is the Reserve, else OFF.
B RSRV – ON when CPU B is the Reserve, else OFF.
Configurable Parameters
Table 96 Redundancy Status configuration parameters
Properties Group Parameter Index # Parameter Description
Value or
Selection
Block Order
N/A Execution Order for Block
Read Only. To
change block
order, right-
click on a
Function Block
and select
Execution
Order.
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