Chapter 16 PLC Function ApplicationsMS300 (High Speed Model)
16-29
16-5-2 Introduction to special relay functions (special M)
R/W items: RO: read only function; RW: read and write function
Special
M
Description of Function R/W *
M1000 Operates monitor NO contact (contact a). NO while RUN, contact a. This contact
is On while in the RUN state.
RO
M1001 Operates monitor NC contact (contact b). NC while RUN, contact b. This contact
is Off while in the RUN state.
RO
M1002 Initiates a forward (the instant RUN is On) pulse. Initial pulse, contact a.
Produces a forward pulse the moment RUN begins; its width = scan cycle
RO
M1003 Initiates a reverse (the instant RUN is Off) pulse. Initial pulse, contact a.
Produces a reverse pulse the moment RUN ends; the pulse width = scan cycle
RO
M1004 Reserved RO
M1005 Drive malfunction instructions RO
M1006 Drive has no output RO
M1007 Drive direction FWD(0)/REV(1) RO
M1008
~
M1010
-- --
M1011
10 ms clock pulse ，5 ms On / 5 ms Off
RO
M1012
100 ms clock pulse ，50 ms On / 50 ms Off
RO
M1013
1 sec. clock pulse ，0.5 s On / 0.5s Off
RO
M1014
1 min. clock pulse ，30 s On / 30 s Off
RO
M1015 Frequency attained (when used together with M1025) RO
M1016 Parameter read/write error RO
M1017 Parameter write successful RO
M1018 -- --
M1019 -- --
M1020 Zero flag RO
M1021 Borrow flag RO
M1022 Carry flag RO
M1023 Divisor is 0 RO
M1024 -- --
M1025
Drive frequency = set frequency (ON)
Drive frequency =0 (OFF)
RW
M1026 Drive operating direction FWD(OFF) / REV(ON) RW
M1027 Drive Reset RW
M1028 -- --
M1029 -- --
M1030 -- --
M1031 -- --
M1032 -- --
M1033 -- --
M1034 -- --
M1035 -- --
M1036 -- --
M1037 -- --
M1038 MI7 count begins RW
M1039 Reset MI7 count value RW
M1040 Hardware power (Servo On) RW
M1041 -- --
M1042 Quick stop RW
M1043 -- --
M1044
Pause (Halt)
RW
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