FX-20P-E Handy programming panel Test 9
9-2
9.2 Forcible setting of devices to ON/OFF
• From the HPP, forcibly set devices in the PLC to ON or OFF.
• The forcible ON/OFF operation is valid for input relays (X), output relays (Y), auxiliary relays
(M), states (S), timers (T) and counters (C).
• The forcible ON/OFF operation sets ON or OFF for devices only in one operation cycle.
While the PLC is in the RUN status, the forcible ON/OFF operation is actually valid to the
present value clearing circuit for timers (T), counters (C), data registers (D) and index
registers (Z and V), the set/reset circuit and the self-holding circuit. (The timer forcible ON
operation is valid only while a timer is driven by a program.)
• While the PLC is in the STOP status or if the execution target device is not used in the
program, the result of the forcible ON/OFF operation is kept as it is. However, because input
refresh is executed to input relays (X) even if the PLC is in the STOP status, the result of the
forcible ON/OFF operation is not kept for input relays (X). (The result is updated to the input
terminal status.)
• Present values of file registers can be cleared only while the program memory in the PLC is
RAM or EEPROM (with the write-protect switch set to OFF).
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