207
The branching structure of this diagram is important in order to ensure that
000200, 000201, and 000202 are controlled properly as the timer counts down.
Because all of the comparisons here use the timer’s PV as reference, the other
operand for each CMP(020) must be in 4-digit BCD.
00000 LD 000000
00001 TIM 0010
#5000
00002 CMP(020)
T0010
#4000
00003 AND A50007
00004 OUT 000200
00005 LD 000200
00006 CMP(020)
T0010
#3000
00007 AND A50007
00008 OUT 000201
00009 LD 000201
00010 CMP(020)
T0010
#2000
00011 AND A50007
00012 OUT 000202
00013 LD T0010
00014 OUT 000203
0000
00
(020)
CMP T0010 #4000
A500
07(<)
TIM 0010 #5000
0002
00
0002
01
(020)
CMP T0010 #3000
0002
02
(020)
CMP T0010 #2000
0002
03
0002
00
0002
01
T0010
A500
07(<)
A500
07(<)
Output at
100 s.
Output at
200 s.
Output at
300 s.
Output at
500 s.
Address Instruction Operands
5-16-2 DOUBLE COMPARE: CMPL(021)
Cp2: 2
nd
compare word CIO, G, A, T, C, #, DM
Cp1: 1
st
compare word CIO, G, A, T, C, #, DM
Operand Data AreasLadder Symbol
(021)
CMPL Cp1 Cp2
When the execution condition is OFF, CMPL(021) is not executed. When the ex-
ecution condition is ON, CMPL(021) compares the eight-digit content of Cp1+1
and Cp1 to the eight-digit content of Cp2+1 and Cp2 and outputs the result to the
GR, EQ, and LE Flags in the Auxiliary Area.
CMPL(021) is an intermediate instruction, like CMP(020). Intermediate instruc-
tions are entered between conditions or between a condition and a right-hand
instruction. Intermediate instructions cannot be placed at the end of an instruc-
tion line.
For version-2 CVM1 CPUs models onwards, non-intermediate instructions
CMP(028) and CMPL(029) are standard.
Constants are expressed in eight digits.
When comparing a value to the PVs of timers or counters, the value must be in
BCD.
Placing other instructions between CMPL(021) and the operation which ac-
cesses the EQ, LE, and GR Flags may change the status of these flags. Be sure
to access them before the desired status is changed.
Note Refer to page 115 for general precautions on operand data areas.
Description
Precautions
Comparison Instructions Section 5-16
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