Mitsubishi Electric MELSEC-Q Structured Programming Manual page 36

FXCPU Structured Programming Manual
[Device & Common]
2. ZRST instruction (zone reset)
The ZRST instruction can clear multiple devices all at once.
(Because only a limited device range can be specified for the ZRST instruction, only a part of latched type
devices can be cleared at a time.)
Program example:
This program clears latched (battery backed-up) type devices in the ranges shown in the table below in the
FX and FX
3U 3UC
Clear input
34
PLCs.
ZRST
EN ENO
d1
M500
d2
M7679
ZRST
EN ENO
d1
S500
d2
S4095
ZRST
EN ENO
d1
T246
d2
T255
ZRST
EN ENO
d1
C100
d2
C199
ZRST
EN ENO
d1
C220
d2
C255
ZRST
EN ENO
d1
D200
d2 D7999
→ For details on latched (backed-up) type devices, refer to Subsection 1.2.2
Latched (backed-up) device range
Auxiliary relay M500 to M7679
State relay S500 to S4095
Timer T246 to T255
C100 to C199,
Counter
C220 to C255
Data register D200 to D7999
1 Device Outline
1.2 Program Memory and Devices