Chapter 16 PLC Function ApplicationsC2000-HS
16-30
Example
LD X0
X0
Y0
CNT C0 K5
X1
RST
C0
C0
RST C0
LD X1
CNT C0 K5
LD C0
OUT Y0
1. When X0=On and the RST command is
executed, the current value of C0 will
revert to 0, and the output contact will
revert to Off.
2. When X1 changes from Off→On, the
current value of the counter will execute
an increase (add one).
3. When the count of counter C0 reaches the
set value K5, the contact C0 will come On,
and the current value of C0＝ set value
=K5. Afterwards, signal C0 triggered by X1
cannot be received, and the current value
of C0 will remain K5.
4.
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 Converter has no output (1 = no output, 0 = output) RO
M1007 Drive direction FWD(0)/REV(1) RO
M1008
–
M1010
-- --
M1011 10 ms clock pulse, 5ms On / 5ms Off RO
M1012 100 ms clock pulse, 50ms On / 50ms Off RO
M1013 1 sec. clock pulse, 0.5s On / 0.5s Off RO
M1014 1 min. clock pulse, 30s On / 30s Off RO
M1015 Frequency attained (when used together with M1025) RO
M1016 Parameter read/write error RO
M1017 Parameter write successful RO
M1018 -- --
To Next Page
Loading...
Need help?
General