Chapter 8 Special Relay
Special relay
8-3
PC operation mode（M）
PC mode（D）
Step ladder flags (M)
Device No. Function Operation
8030 No-battery mode
8031
Non-retentive register all clear(when
executing END instruction)
When M8031 ON, the ON/ OFF status
Y/M/S/T/C and present value of T/C/D are
reset. However, special Data register will
not be cleared.
8032
Retentive register all clear(when
executing END instruction)
When M8032 ON, the retentive registers are
reset.
8033 Register hold in stop mode note:1
Saving mode for Register
0: STOP→RUN, TP03 saves according to
requirement
1: STOP→RUN,TP03 saves all data
8034 Output prohibit 1: output 0; 0: output Y
8035 Enforced operation mode
When M8035 on, the No. of X input which
D8035 specified can be used for RUN
control
8036 Enforced Run instruction
When M8036 on, the PLC will switch into
RUN
8037 Enforced Stop instruction
When M8037 on, the PLC will switch into
STOP
8039 Constant scan mode
1: ENABLE; 0: DISABLE
This register will not be initiated in Power
ON.
Device No. Function Operation
8039 Constant scan time Default: 0, unit: ms
Device No. Function Operation
8040 STL transfer disable M8040 ON, STL transfer is disabled.
8041 STL transfer start
When M8041 ON, STL state transfer is enabled in automatic
operation
8046 STL state ON
When M8047 is ON and any one of S0~S899 is on, M8064 will
be ON.
8047 Enable STL monitor As long as M8047 is ON, D8040~D8047 are enabled.
8048 Annunciator ON
If M8049 ON, and any one of S900~S999 is on, M8048 will be
ON
8049 Enable Annunciator M8049 ON, D8049 is enabled.
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