Chapter 16 PLC Function Applications│CP2000
16-58
API
CMP
S1 S2 D
Compares set output
10
D P
Bit device Word device
16-bit command (7 STEP)
CMP Continuous
execution type
CMPP Pulse
execution type
32-bit command (13 STEP)
DCMP Continuous
execution type
DCMPP Pulse
execution type
Flag signal: none
X Y M K H KnX KnY KnM T C D
S1
＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊
S2
＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊
D
＊ ＊
Notes on operand usage:
The operand D occupies three consecutive points
S1
: Compare value 1.
S2
: Compare value 2.
D
: Results of comparison.
Compares the size of the content of operand
S1
and
S2
; the results of
comparison are expressed in
D
.
Size comparison is performed algebraically. All data is compared in the form of
numerical binary values. Because this is a 16-bit command, when b15 is 1, this
indicates a negative number.
When the designated device is Y0, it automatically occupies Y0, Y1 and Y2.
When X10=On, the CMP command executes, and Y0, Y1 or Y2 will be On. When
X10=Off, the CMP command will not execute, and the state of Y0, Y1 and Y2 will
remain in the state prior to X10=Off.
If ≥, ≤, or ≠ results are needed, they can be obtained via series/parallel
connections of Y0-Y2.
X10
Y0
Y1
Y2
CMP K10 D10 Y0
If K10>D10, Y0 = On
If K10=D10, Y1 = On
If K10<D10, Y2= On
To clear results of comparison, use the RST or ZRST command.
X10
M0
RST
M1
RST
M2
RST
X10
M0ZRST
M2
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