M Code Independent Output; Operation Sequence - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
12 Handling of M, S, T, B Functions

12.4 M Code Independent Output

12.4 M Code Independent Output
The following four types of M codes output "M code independent output" signal (decode signals) separately from their code
signals and MF. The M code independent output is generally used with the following details, but the CNC outputs only the
decode signal, and the operation and finish signal processes, etc., are carried out by the user PLC (machine).
 M00: Program stop
<Example of process> The block stop state is entered when M00 is commanded.
 M01: Optional stop
<Example of process> The block stop state is entered when M01 is commanded and the optional stop selection switch is
selected.
 M02, M30: Program end
<Example of process> When M02 or M30 is commanded, "Reset" or "Reset & rewind" is returned to the CNC, and the reset
state is entered.

12.4.1 Operation Sequence

The "M code independent output" signal turns ON when M00, M01, or M30 is commanded during automatic operation
(memory, MDI or tape) or by the manual numerical command, and turns OFF with the "FIN1", "FIN2", "Reset 1", "Reset 2" or
"Reset & rewind" signal.
Example of M01 process (stopping the block with the M01 command)
In cycle start
M code
M code independent
output
MF
FIN1
Optional switch
Single block
[Explanation of operation]
(a) The CNC outputs the M code data and MF to the PLC (machine).
Refer to the section "12.6 Precautions" for details on the M code data and MF output timing.
(b)(c) The PLC (machine) confirms that the MF signal has turned ON, and then carries out the specified operation. It then
confirms that the "Optional switch" is ON, and then turns "Single block" and "FIN1" ON.
(d)(e) The CNC confirms that FIN1 has turned ON, and then turns the MF and "M code independent output" signal OFF. The
PLC (machine) confirms that MF has turned OFF, and then turns FIN1 OFF.
(f) The CNC confirms that FIN1 has turned OFF, and then turns "In cycle start" signal OFF.
(g) The PLC (machine) confirms that "In cycle start" signal has turned OFF, and then turns the "Single block" OFF at the next
cycle start.
IB-1501668-B
M01
M01
(a) (b) (c) (d) (e) (f)
484
Block stop state
* Turns OFF after
confirming that "In
cycle start" is OFF.
(g)