Double Signed Binary Compare - Cpsl - Omron CQM1H - PROGRAM Programming Manual

Comparison Instructions
Precautions
Flags
Example
TR
0
00500
25505
25506
25507
5-19-7 DOUBLE SIGNED BINARY COMPARE – CPSL(––)
Placing other instructions between CPS(––) and the operation which
accesses the EQ, LE, and GR flags may change the status of these flags. Be
sure to access them before the desired status is changed.
ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
EQ: ON if Cp1 equals Cp2.
LE: ON if Cp1 is less than Cp2.
GR: ON if Cp1 is greater than Cp2.
Comparison result
Cp1 < Cp2
Cp1 = Cp2
Cp1 > Cp2
In the following example, the content of 102 is greater than that of DM 0020,
so 10000 is turned ON and the other bits, 10001 and 10002, are turned OFF.
CPS(−−)
102
DM 0020
000
10000
Greater Than
10001
Equal
10002
Less Than
Cp1: 102
6 F A 4
(28,580 decimal)
Ladder Symbols
CPSL(−−)
Cp1
Cp2
000
Flag status
GR (SR 25505) EQ (SR 25506)
0 0
0 1
1 0
Address Instruction
00000 LD
00001 OUT
00002 CPS(−−)
00003 AND
00004 OUT
00005 LD
00006 AND
00007 OUT
00008 LD
00009 AND
00010 OUT
Cp2: DM 0020
>
A E 3 5
(−20,939 decimal)
Operand Data Areas
Cp1: First compare word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
Cp2: Second compare word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
Not used. Set to 000.
Section 5-19
LE (SR 25507)
1
0
0
Operands
00500
TR 0
102
DM 0020
000
25505
10000
TR 0
25506
10001
TR 0
25507
10002
000
287