Sa, %Sb, And %Sc References - Emerson PaCSystems VersaMax Series User Manual

User Manual
GFK-1503F
9.3.3

%SA, %SB, and %SC References

References in %SA, %SB, and %SC memory can be both read and written to.
Reference
%SA0001
%SA0002
%SA0003
%SA0004-8
%SA0009
%SA0010
%SA0011
%SA0012,13
%SA0014
%SA0015
%SA0016-18
%SA0019
%SA0020
%SA0021-26
%SA0027
%SA0028-30
%SA0031
%SB0001-9
Program Data
Name Definition
PB_SUM Set when a checksum calculated on the application program does
not match the reference checksum. If the fault was due to a
temporary failure, the discrete bit can be cleared by again storing
the program to the CPU. If the fault was due to a hard RAM failure,
the CPU must be replaced.
OV_SWP
Set when a PLC in CONSTANT SWEEP mode detects that the
previous sweep took longer than the time specified. Cleared when
the PLC detects that the previous sweep did not take longer than
specified. Also cleared during transition from STOP to RUN mode.
APL_FLT Set when an application fault occurs.
transitions from STOP to RUN mode.
reserved
CFG_MM
Set when a configuration mismatch is detected during power-up or
a configuration store.
correcting the condition.
HRD_CPU
Set when the diagnostics detects a problem with the CPU hardware.
Cleared by replacing the CPU module.
LOW_BAT Set when a low battery fault occurs. Cleared by replacing the battery
then powering up the PLC.
reserved
LOS_IOM Set when an I/O module stops communicating with the CPU.
Cleared by replacing the module and cycling system power.
LOS_SIO
Set when an option module stops communicating with the CPU.
Cleared by replacing the module and cycling power on the main
rack.
reserved
ADD_IOM Set when an I/O module is added. Cleared by cycling PLC power and
when the configuration matches the hardware after a store.
ADD_SIO Set when an option module is added. Cleared by cycling PLC power
and when the configuration matches the hardware after a store.
reserved
HRD_SIO Set when a hardware failure is detected in an option module.
Cleared by replacing the module and cycling PLC power.
reserved
SFT_SIO Set when an unrecoverable software fault is detected in an option
module. Cleared by cycling PLC power and when the configuration
matches the hardware.
reserved
Cleared when the PLC
Cleared by powering up the PLC after
Chapter 9
Jan 2020
95