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Precautions Placing other instructions between ZCP(88) 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.)
LL is greater than UL.
EQ: ON if LL ≤ CD ≤ UL
LE: ON if CD < LL.
GR: ON if CD > UL.
The following example shows how to save the comparison result immediately. If
IR 100 > AB1F, IR 00200 is turned ON; if #0010 ≤ IR 100 ≤ AB1F, IR 00201 is
turned ON; if IR 100 < 0010, IR 00202 is turned ON.
ZCP(88)
#0010
IR 100
00000
25505
00200
25507
00202
TR
0
25506
00201
Greater Than
(above range)
Equal
(within range)
Less Than
(below range)
Address Instruction Operands Address Instruction Operands
00000 LD 00000
00001 OUT TR 0
00002 ZCP(88)
IR 100
# 0010
# AB1F
00003 AND 25505
00004 OUT 00200
00005 LD TR 0
00006 AND 25506
00007 OUT 00201
00008 LD TR 0
00009 AND 25507
00010 OUT 00202
#AB1F
5-17-7 DOUBLE AREA RANGE COMPARE – ZCPL(––)
CD: Compare data
IR, SR, AR, DM, HR, LR
LL: Lower limit of range
IR, SR, AR, DM, HR, LR
Ladder Symbols
Operand Data Areas
UL: Upper limit of range
IR, SR, AR, DM, HR, LR
ZCPL(––)
CD
LL
UL
Limitations The 8-digit value in LL+1,LL must be less than or equal to UL+1,UL.
CD and CD+1 must be in the same data area, as must LL and LL+1, and UL and
UL+1.
Example:
Saving ZCP(88) Results
Data Comparison Section 5-17