Precautions And Restrictions - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
12 Handling of M, S, T, B Functions
12.3 Miscellaneous Command High-Speed Output
 In the case where a miscellaneous command output is waited (When "FIN2" is used)
The program proceeds to the next block when the previous miscellaneous command is completed. (Rising edge of "FIN2")
Machining program
M code data
NC PLC
Strobe (MFn)
PLC NC FIN2
Note
(1) Note that if "FIN2" is used as the finish signal with the method that does not wait for a finish signal from the PLC and when
the previous M command is not completed yet (the previous strobe signal is still ON), the program will proceed to a new
command upon the rising edge of "FIN2"; therefore, the strobe signal stays ON during this whole process.
 In the case where a miscellaneous command output is waited (When "FIN1" is used and a movement
command and a miscellaneous command are issued within the same block)
When a movement command and a miscellaneous command are issued within the same block that is next to a miscellaneous
command block, the program proceeds to the next block when the previous miscellaneous command is completed.
(When "FIN1" is used and a movement command and a miscellaneous command are issued within the same block)
Machining program
X axis operation
M code data
NC PLC
Strobe (MFn)
PLC NC FIN1

12.3.3 Precautions and Restrictions

(1) In the method that does not wait for a finish signal from the PLC, if a miscellaneous command is issued with a previous
miscellaneous command not completed yet (the previous strobe signal is still ON), the program will proceed to the new
miscellaneous command upon the rising edge of FIN2 of the previous command; therefore, the strobe signal stays ON
during this whole process. In consequence, the FIN2 signal should be input not as an OUT command but as a SET com-
mand (one-shot) in the sequence process. Refer to "12.3.2 Operation Sequence for Normal Method: Operation Sequence
for Normal Method: Operation sequence where a series of miscellaneous commands are issued and when a previous
miscellaneous command is not completed")
(2) In the method that does not wait for a finish signal from the PLC, if a miscellaneous command that does not wait for a fin-
ish signal from the PLC and a miscellaneous command that waits for a finish signal from the PLC are both issued within
the same block, the program will proceed to the next block after the finish signal from the PLC is received.
(3) Even in the method that does not wait for a finish signal from the PLC, an M code independent command (M00, M01,
M02 or M30) waits for a finish signal from the PLC.
Myy
Mxx
Mxx code data
Mxx strobe
Mxx
Mxx
Mxx strobe
483
Next block
Myy code data
Myy strobe
G00 X_ Myy
Myy
Myy strobe
IB-1501668-B