GFK-0467K Chapter 2 System Operation 2-25
2
Table 2-6. System Status References - ContinuedReference Name Definition
%S0017 SNPXACT SNP-X host is actively attached to the CPU.
%S0018 SNPX_RD SNP-X host has read data from the CPU.
%S0019 SNPX_WT SNP-X host has written data to the CPU.
%S0020 Set ON when a relational function using REAL data executes successfully.
It is cleared when either input is NaN (Not a Number).
%S0032 Reserved for use by the programming software.
%SA0001 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.
%SA0002 OV_SWP Set when the PLC detects that the previous sweep took longer than the
time specified by the user. Cleared when the PLC detects that
the previous sweep did not take longer than the specified time. It is also
cleared during the transition from STOP to RUN mode. Only valid if the
PLC is in CONSTANT SWEEP mode.
%SA0003 APL_FLT Set when an application fault occurs. Cleared when the PLC
transitions from STOP to RUN mode.
%SA0009 CFG_MM Set when a configuration mismatch is detected during system
power-up or during a store of the configuration. Cleared by
powering up the PLC when no mismatches are present or during a store of
configuration that matches hardware.
%SA0010 HRD_CPU Set when the diagnostics detects a problem with the CPU hardware.
Cleared by replacing the CPU module.
%SA0011 LOW_BAT Set when a low battery fault occurs. Cleared by replacing the
battery and ensuring that the PLC powers up without the low
battery condition.
%SA0014 LOS_IOM Set when an I/O module stops communicating with the PLC CPU. Cleared
by replacing the module and cycling power on the main rack.
%SA0015 LOS_SIO Set when an option module stops communicating with the PLC
CPU. Cleared by replacing the module and cycling power on the main
rack.
%SA0019 ADD_IOM Set when an I/O module is added to a rack. Cleared by cycling
power on the main rack and when the configuration matches the hardware
after a store.
%SA0020 ADD_SIO Set when an option module is added to a rack. Cleared by cycling power
on the main rack and when the configuration matches the hardware after a
store.
%SA0027 HRD_SIO Set when a hardware failure is detected in an option module. Cleared by
replacing the module and cycling power on the main rack.
%SA0031 SFT_SIO Set when an unrecoverable software fault is detected in an option module.
Cleared by cycling power on the main rack and when the configuration
matches the hardware.