179
Flags ER: Indirectly
addressed DM word
is non-existent. (Content of
∗
DM word is
not BCD, or the 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
Flag status
GR (SR 25505) EQ (SR 25506) LE (SR 25505)
Cp1 < Cp2 0 0 1
Cp1 = Cp2 0 1 0
Cp1 > Cp2 1 0 0
5-17-9 DOUBLE SIGNED BINARY COMPARE – CPSL(––)
Cp1: First compare word
IR, SR, AR, DM, HR, TC, LR
Cp2: Second compare word
IR, SR, AR, DM, HR, TC, LR
Ladder Symbols Operand Data Areas
CPSL(––)
Cp1
Cp2
Limitations Cp1 and Cp1+1 must be in the same data area, as must Cp2 and Cp2+1.
Description When
the execution condition is OFF
, CPSL(––) is not executed.
When the exe
-
cution condition is ON, CPSL(––) compares the 32-bit (8-digit) signed binary
contents
in Cp1+1, Cp1 and Cp2+1, Cp2 and outputs the result to the GR, EQ,
and LE flags in the SR area.
Note 1. Refer to page 29 for details on 32-bit signed binary data.
2. Refer to 5-17-2 Compare – CMP(20) for details on saving comparison re-
sults.
Precautions Placing
other instructions between CPSL(––) and the operation which
accesses
the
EQ, LE, and GR flags may change the status of these flags. Be sure to
ac
-
cess them before the desired status is changed.
Flags ER: Indirectly
addressed DM word
is non-existent. (Content of
∗
DM word is
not BCD, or the DM area boundary has been exceeded.)
EQ: ON if Cp1+1, Cp1 equals Cp2+1, Cp2.
LE: ON if Cp1+1, Cp1 is less than Cp2+1, Cp2.
GR: ON if Cp1+1, Cp1 is greater than Cp2+1, Cp2.
Comparison result
Flag status
GR (SR 25505) EQ (SR 25506) LE (SR 25507)
Cp1+1, Cp1 < Cp2+1, Cp2 0 0 1
Cp1+1, Cp1 = Cp2+1, Cp2 0 1 0
Cp1+1, Cp1 > Cp2+1, Cp2 1 0 0
Data Comparison Section 5-17
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