Mitsubishi Electric MELSEC-Q Structured Programming Manual page 161

FXCPU Structured Programming Manual
[Device & Common]
Number and name
Step ladder and annunciator
M 8040
Disables transfer between states.
Transfer disable
*1
Enables transfer from the initial state during automatic
[M]8041
operation.
Transfer start
[M]8042
Gives pulse output in response to start input.
Start pulse
*1
M 8043
Should be set to ON in the zero return mode end state.
Zero point return
complete
*1
Should be set to ON when the machine zero point is
M 8044
detected.
Zero point condition
M 8045 Disables reset of all outputs when the operation mode
All output reset disable switches.
*2*3
Remains ON while M8047 is ON and either state relay
[M]8046
shown in the right is ON.
STL state ON
*2
M 8047
Enables M8040 to D8047.
STL monitoring enable
*2
Remains ON while M8049 is ON and either one among
[M]8048
S900 to S999 is ON.
Annunciator ON
*1
M 8049
Enables D8049.
Annunciator enable
*1. Cleared when the PLC mode switches from RUN to STOP.
*2. Activated when the END instruction is executed.
*3. State relays S128 to S999 are backed up by the capacitor in FX
expires, the status of these state relays is not held correctly. In this case, M8046 may turn ON.
Interrupt disable
*4
M 8050
(Input interrupt)
I00 disable
*4
M 8051
(Input interrupt)
I10 disable
• When a special M for disabling input interrupt or timer
*4
M 8052
interrupt is ON
(Input interrupt)
Even if an input interrupt or timer interrupt occurs while
I20 disable
acceptance of the corresponding interrupt is disabled,
*4
M 8053 the interrupt program is not executed.
(Input interrupt)
For example, when the interrupt I00
I30 disable
M8050 is ON (to disable the interrupt I00 ), the interrupt
program is not executed even within the interrupt
*4
M 8054
enabled program area.
(Input interrupt)
• When a special M for disabling input interrupt or timer
I40 disable
interrupt is OFF
*4
M 8055
a) When an input interrupt or timer interrupt occurs, it
(Input interrupt)
b) The interrupt program is executed immediately if
I50 disable
*4
M 8056
(Timer interrupt)
I6 disable
*4
M 8057
(Timer interrupt)
I7 disable
*4
M 8058
(Timer interrupt)
I8 disable
*4
M 8059
Disables interrupts I010 to I060.
Counter interrupt
disable
*4. Cleared when the PLC mode switches from RUN to STOP.
Operation and function
is given while
is accepted.
interrupts are enabled by the EI instruction.
If the DI instruction disables interrupts, execution of
the interrupt program is paused until the EI
instruction enables interrupts.
4 Operations of Special Devices (M8000 and later, D8000 and later)
4.1 Special Device List (M8000 and later, D8000 and later)
FX FX FX
1S 1N 2N
S0 to S0 to S0 to
S127 S999 S899
- -
- -
/FX
1N
- -
- -
- -
- -
Applicable model
Corresponding
FX FX
1NC 2NC
special device
-
-
-
-
-
-
S0 to S0 to M8047
S999 S899
D8040 to D8047
- -
D8049
-
M8048
PLCs. If the backup period
1NC
-
-
-
-
-
-
- -
- -
- -
- -
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