User manual

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Word register F1 (F1.0 to F1.15)
Only a bit process is available.
The 16 bits in the F1 address provide the CPU’s special function and self-diagnosis result. They are used for
status contacts only, and are not used to modify or control the PLC. Only the F1.5 instantaneous interrupt display contact
should be used as an output contact by the user, to be turned off after power loss indication.
NOTE
Address Function Description Remarks
F1.0 First single scan
Maintain On state for first single-scan period, when the CPU
shanges its status stop to Run.
F1.1 Scan clock
Cycle On/Off state for each scan during the program.
(1Scan On, 1Scan Off)
F1.2 0.02-second clock
10 ms: On, 10 ms: Off
F1.3 0.1-second clock
50 ms: On, 50 ms: Off
F1.4 1-second clock
500 ms: On, 500 ms: Off
F1.5
Instantaneous
interrupt
On when power is off for 20 ms or more. Maintained
F1.6
CPU running
status
On when the CPU is in the run state.
F1.7
Keep area
error display
On when the K retentive data is destroyed and/or changed.
F1.8 Carry flag On in the event of carry when performing math instruction.
F1.9
Division
by zero error
On when the denominator of division commands is zero.
F1.10
Range designation
error
On when the absolute address exceeds the specified range.
F1.11 Reserved System use area Do not use
F1.12
W area error
indication
System use area
F1.13 Reserved System use area Do not use
F1.14 Reserved System use area Do not use
F1.15 Reserved System use area Do not use
10m S 10m S 10m S
50m S 50m S 50m S
500mS 500mS 500mS
NOTE