Mitsubishi Electric MELDAS C6 Interface Manual page 241

B con-
Signal name
tact
—
M FUNCTION FINISH 2
[Function]
This status signal informs the controller that specified miscellaneous (M) function, spindle (S)
function, tool (T) function or 2nd miscellaneous function (A, B or C) is accomplished on the PLC
side. When too much signals FIN1 must be used, this signal can be used instead of signal FIN1 to
save time.
[Operation]
If the M, S, T or 2nd M function command is executed during automatic operation, the code and
each function strobe (MF1 to MF4, SF1 to 7, TF1 to 4, BF1 to BF4) will turn ON.
When the PLC verifies that one or more M, S, T and/or 2nd M function has been specified, it
performs that function(s) and, after completion of the function(s), "M function finish 2 (FIN2)" signal
turns ON.
When the controller verifies that signal FIN2 turns ON, it turns OFF strobe signal of corresponding
function.
When each strobe signal turns OFF, the PLC turns OFF signal FIN2. With the signal FIN2 turned
OFF, the controller proceeds to the next block.
An example of timing chart, where M function is specified, is as follows:
Command program
M function strobe (MF1)
M function finish 2 (FIN2)
There are two types of M function finish signals, namely, "M function finish 1" (refer to the previous
page) and "M function finish 2". The only difference is if the next block is proceeded to at the falling
edge or at the rising edge. These can be used separately per operation in one PLC.
(Note 1) "M function finish 2 (FIN2)" signal is common to M, S, T and B functions.
(Note 2) The M function finish 2 signal is also the signal for upgrading the spindle speed output (S
analog data, etc.) during S function execution.
(Note 3) If signal FIN2 has been ON before M, S, T or B function is specified, data pertinent to M, S,
T or B function are not output.
(Note 4) When "Reset & rewind" signal (RRW) is sent to the controller by M02 or M30, "M function
finish" 2 or 1 signal should not be sent back. If the "M function finish 2 (1)" signal is return
with the M02 command at the end of the machining program, the NC alarm "P36
PROGRAM END ERR" will occur.
[Related signals]
(1) M function finish 1 (FIN1: Y71E)
(2) M, S, T, B function strobe (MF1 to MF4, SF1 to 7, TF1 to 4, BF1 to 4: X644 to 647, X658 to 65E,
X650 to 653, X654 to 657)
(3) M, S, T, B function data (output to file register R)
(4) Reset & rewind (RRW: Y71A)
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
FIN2
6-3-44
1st system 2nd system
Y71F Y7FF
M08 Next block
3rd system
Y8DF