Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 233

■Applicable devices
Operand Bit
X, Y, M, L, J\
SM, F, B, SB,
FX, FY
(s1)  
 
(s2)
(d)  
 
(n)
Processing details
• These instructions compare the (n) points of 16-bit binary data from the device specified by (s1) with the (n) points of 16-bit
binary data from the device specified by (s2), and stores the operation result in the device specified by (d) and later.
• If the comparison condition is satisfied, the relevant device specified by (d) turns on; otherwise, the device turns off.
(s1) 1234 (BIN)
(s1)+1
5678 (BIN)
(s1)+2
5000 (BIN)
(n)
(s1)+(n)-2
7777 (BIN)
(s1)+(n)-1
4321 (BIN)
• Specify data in units of 16 bits.
• A constant can be specified for (s1).
=
(s1) 32000 (BIN)
• The following table lists the comparison operation results of each instruction.
Instruction symbol (ladder, FBD/LD)
BKCMP=(P)(_U), BKCMP_EQ(P)(_U)
BKCMP<>(P)(_U), BKCMP_NE(P)(_U)
BKCMP>(P)(_U), BKCMP_GT(P)(_U)
BKCMP<=(P)(_U), BKCMP_LE(P)(_U)
BKCMP<(P)(_U), BKCMP_LT(P)(_U)
BKCMP>=(P)(_U), BKCMP_GE(P)(_U)
BKCMP=(P)(_U), BKCMP_EQ(P)(_U)
BKCMP<>(P)(_U), BKCMP_NE(P)(_U)
BKCMP>(P)(_U), BKCMP_GT(P)(_U)
BKCMP<=(P)(_U), BKCMP_LE(P)(_U)
BKCMP<(P)(_U), BKCMP_LT(P)(_U)
BKCMP>=(P)(_U), BKCMP_GE(P)(_U)
• When the comparison operation results stored in (n) points from the device specified by (d) are all on (1), SM704 turns on.
Operation error
Error code Description
(SD0)
2821H The device ranges starting from the ones specified by (s1) and (d) are overlapping.
The device ranges starting from the ones specified by (s2) and (d) are overlapping.
Word
T, ST, C, D, W, U\G, J\,
SD, SW, FD, R, U3E\(H)G
ZR, RD
 
 
 
 
(s2) 5321 (BIN)
(s2)+1 3399 (BIN)
(s2)+2 5678 (BIN)
>
(s2)+(n)-2 6543 (BIN)
(s2)+(n)-1
1200 (BIN)
(s2)
32000 (BIN)
(s2)+1 4321 (BIN)
(s2)+2
32000 (BIN)
(n)
(s2)+(n)-2 1234 (BIN)
(s2)+(n)-1
5678 (BIN)
Condition
(s1)=(s2)
(s1)(s2)
(s1)>(s2)
(s1)(s2)
(s1)<(s2)
(s1)(s2)
(s1)(s2)
(s1)=(s2)
(s1)(s2)
(s1)>(s2)
(s1)(s2)
(s1)<(s2)
Double word Indirect
Z LT, LST, LZ
LC
  
  
  
  
(d) OFF
(d)+1
ON
(d)+2
OFF
(n)
(d)+(n)-2
ON
(d)+(n)-1
ON
(d)
ON (1)
(d)+1 OFF (0)
(d)+2
ON (1)
(d)+(n)-2 OFF (0)
(d)+(n)-1
OFF (0)
Result
On (1)
Off (0)
6.1 Comparison Operation Instructions
Constant Others
specification
K, H E $
    
    
    
    
(0)
(1)
(0)
(n)
(1)
(1)
(n)
6 BASIC INSTRUCTIONS
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