Omron CS1W-MC221 -, Operation Manual

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M Code Outputs Section 7-4
6. The program ends in block N004.
7-4-2 M Code Data
There are some M codes that interlock as explained on the previous page,
and others that do not interlock. These differences are explained below.
When an M code is specified in a register or position data address, the speci-
fied value will be rounded to the nearest integer value. An error will occur if the
result is not an acceptable M code value (0 to 999).
M Codes 0 to 499 M codes 0 to 499 are used to interlock with external devices. Execution of the
program is paused when there is not an M code reset input.
M Codes 500 to 999 Use M codes 500 to 999 when it is not necessary to interlock. These M codes
are just output and the program is executed without waiting for an M code
reset input.
These M codes are cleared when the PROGRAM END command (G79) is
executed.
7-4-3 M Code Examples
M codes can be used independently or with G codes, such as G00 and G01,
that execute axis operations.
Example The following program just outputs M code 600. (M codes over 499 do not
interlock.)
N000 P000 X
N001 G01 X100 F100 M600
N002 G01 X200 F100
N003 G79
7-4-4 Effect of Mode Changes on M Code Resets
The status of M codes is not affected by switching from manual to automatic
mode or vice versa.
7-4-5 Clearing M000 to M499 with Forced Block End or G74
The M strobe and M code outputs for M codes 000 to 499 will be cleared if the
program block that outputs the M code is cleared with the Forced Block End
Bit (PLC Interface Area) or the OPTIONAL END (G74) command.
X-axis operation
MC Unit
M Strobe
M Code
Command
from the
CPU Unit M Code Reset
Block N002 is executed immediately,
without waiting for the M Code Reset
input.