Mitsubishi FX2-16E series, User Manual

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FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
473
A Operation of Special Devices (M8000 -, D8000 -)
A-1 Special Auxiliary Relay (M8000 to M8511)
21
Memor
y
Cas
sette
22
B
attery
A
S
pe
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l D
ev
ice
s
(M
8000-
,D800
0-)
B
Instruction Li
st
C
C
haracte
r-c
ode
D
D
isc
onti
nued
mod
els
E
Pr
ec
auti
ons
for
battery transport
ati
on
F
Handli
ng of
batteries i
n EU
member st
ates
Appendix A: Operation of Special Devices (M8000 -, D8000 -)
The device numbers and functions of the special auxiliary relays (indicated as "special M" in tables) and
special data registers (indicated as "special D" in tables) are shown below.
Note that functions of certain devices vary depending on the series of the PLC.
Do not use the undefined / blank special auxiliary relays and special data registers in the sequence program
since they are occupied by the CPU.
In addition, do not activate or write to the devices with brackets on the first letter such as [M]8000 or [D]8001
in the program.
→
For detailed explanation, refer to the Programming Manual.
Appendix A-1 Special Auxiliary Relay (M8000 to M8511)
Number and
name
Operation and function
Correspond-
ing special
device
PLC Status
[M]8000
RUN monitor
NO contact
–
[M]8001
RUN monitor
NC contact
–
[M]8002
Initial pulse
NO contact
–
[M]8003
Initial pulse
NC contact
–
[M]8004
Error occurrence
ON when either M8060, M8061,
M8064, M8065, M8066, or M8067
is ON.
D8004
[M]8005
Battery voltage
low
ON when battery voltage is below
the value set in D8006.
D8005
[M]8006
Battery error latch It is set when battery voltage low is
detected.
D8006
[M]8007
Momentary power
failure
ON for 1 scan, when detecting
momentary power failure
Even if M8007 turns ON, PLC
continues to RUN mode in case
duration of power loss is within
period of time specified in D8008.
D8007
D8008
[M]8008
Power failure
detected
It is set when momentary power
failure is detected.
If power loss time is longer than
period of time specified in D8008,
M8008 is reset and PLC is turned
in STOP mode.(M8000=OFF).
D8008
[M]8009
24V DC down
ON when 24V DC power fails in
any I/O extension unit or special
function unit/block.
D8009
1 scan time
RUN
input
M8000
M8001
M8002
M8003
M8061
Error occurrence
Clock
[M]8010 Not used –
[M]8011
10 ms clock pulse ON and OFF in 10 ms cycle
(ON: 5 ms, OFF: 5 ms)
–
[M]8012
100 ms clock
pulse
ON and OFF in 100 ms cycle
(ON: 50 ms, OFF: 50 ms)
–
[M]8013
1 sec clock pulse ON and OFF in 1 sec cycle
(ON: 500 ms, OFF: 500 ms)
–
[M]8014
1 min clock pulse ON and OFF in 1 min cycle
(ON: 30 sec, OFF: 30 sec)
–
M 8015
Clock stop and preset
For real time clock
–
M 8016
Time read display is stopped
For real time clock
–
M 8017
±30 seconds correction
For real time clock
–
[M]8018
Installation detection (Always ON)
For real time clock
–
M 8019
Real time clock (RTC) error
For real time clock
–
Flag
[M]8020
Zero ON when the result of addition/
subtraction is 0.
–
[M]8021
Borrow ON when the result of subtraction is
less than the min. negative number.
–
M 8022
Carry
ON when 'carry' occurs as a result
of addition or when an overflow
occurs as a result of shift operation.
–
[M]8023 Not used –
M 8024
*1
BMOV direction specification
(FNC 15)
–
M 8025
*1
HSC mode
(FNC 53 to 55)
–
M 8026
*1
RAMP mode
(FNC 67)
–
M 8027
*1
PR mode
(FNC 77)
–
M 8028
Interrupt permission during FROM/
TO (FNC 78 and 79) instruction
execution
–
[M]8029
Instruction
execution complete
ON when operation such as DSW
(FNC 72) is completed.
–
*1. Cleared when PLC switches from RUN to STOP.
Number and
name
Operation and function
Correspond-
ing special
device