Plc Status Diagnostic Information (M8000 To M8009; Clock Devices And Real Time Clock (M8011 To M8019 - Mitsubishi Electric FX Series Training Manual

Special Relays
A.1.1

PLC Status Diagnostic Information (M8000 to M8009)

Special Relay
M8000
M8001
M8002
M8003
M8004
M8005
M8006
M8007
M8008
M8009
A.1.2

Clock Devices and Real Time Clock (M8011 to M8019)

Special Relay
M8010
M8011
M8012
M8013
M8014
M8015
M8016
M8017
M8018
M8019
A - 2
Read Write CPU
©
—
©
— FX
1S
FX
1N
FX
2N
FX
2NC
FX
3G
FX
3U
FX
3UC
©
—
©
—
©
—
FX
2N
©
—
FX
2NC
FX
3G
FX
©
3U
—
FX
3UC
©
— FX
2N
FX
2NC
FX
©
3U
—
FX
3UC
FX
2N
FX
2NC
©
— FX
3G
FX
3U
FX
3UC
Read Write CPU
— — —
©
—
©
—
©
—
FX
1S
©
— FX
1N
FX
2N
© ©
FX
2NC
FX
3G
FX
3U
©
—
FX
3UC
© ©
©
—
©
—
Function
RUN state
RUN monitor
(NO contact)
M8004
RUN monitor
M8000
(NC contact)
M8001
Initial pulse
M8002
(NO contact)
M8003
Initial pulse
(NC contact)
Error occurrence
Battery voltage low (ON when battery voltage is below the
value set in D8006)
Battery error latch (M8006 is set when battery voltage low is
detected)
Momentary power failure
Power failure detected
24V DC down (service power supply)
Function
Not used
10 ms clock pulse
ON and OFF in 10 ms cycle (ON: 5 ms, OFF: 5 ms)
100 ms clock pulse
ON and OFF in 100 ms cycle (ON: 50 ms, OFF: 50 ms)
1 s clock pulse
ON and OFF in 1 s cycle (ON: 500 ms, OFF: 500 ms)
1 min clock pulse
ON and OFF in 1 min cycle (ON: 30 s, OFF: 30 s)
Clock stop and preset (For real time clock)
Time read display is stopped (For real time clock)
The contents of D8013 to D8019 is frozen, but the clock is
still running.
±30 seconds correction (For real time clock)
Real time clock installation detection (Always ON)
For an FX a memory card with integrated RTC must be
2NC
installed.
Real time clock (RTC) setting error
Appendix
1 scan time
MITSUBISHI ELECTRIC