Mitsubishi FX-20P-E, Operation Manual

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FX-20P-E Handy programming panel Others Function 10
10-20
10.8 Latch clear (online mode)
• Clear the latch set to devices.
• The latch clear function is valid only in the online mode.
• The latch clear operation can be executed for auxiliary relays (M), states (S), counters (C),
data registers (D) and file registers (D).
• The latch clear function is valid regardless to the program memory type (RAM, EEPROM or
EPROM) for all devices mentioned previously except file registers.
If the program memory is EPROM, file registers cannot be cleared.
If the program memory is EEPROM, file registers can be cleared only when the write-
protect switch is OFF.
• Set the PLC to the STOP status before executing the latch clear operation.
Latch clear operation condition
PLC
status
RUN:
×
STOP:
✓
Valid memory Inbuilt memory:
✓
RAM cassette:
✓
EEPROM
cassette:
✓
EPROM
cassette:
✓