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Section 5-17
Data Comparison
Example
The following example shows the comparisons made and the results provided
for BCMP(68). Here, the comparison is made during each cycle when 00000 is
ON.
00000
BCMP(68)
Address
Instruction
00000
00001
LD
BCMP(68)
001
HR 10
Operands
00000
HR 05
HR
HR
CD 001
001
Lower limits
0210
HR 10
HR 12
HR 14
HR 16
HR 18
HR 20
HR 22
HR 24
HR 26
HR 28
HR 30
HR 32
HR 34
HR 36
HR 38
HR 40
Compare data in IR 001
(which contains 0210)
with the given ranges.
Upper limits
0000
0101
0201
0301
0401
0501
0601
0701
0801
0901
1001
1101
1201
1301
1401
1501
HR 11
HR 13
HR 15
HR 17
HR 19
HR 21
HR 23
HR 25
HR 27
HR 29
HR 31
HR 33
HR 35
HR 37
HR 39
HR 41
001
10
05
R: HR 05
0100
0200
0300
0400
0500
0600
0700
0800
0900
1000
1100
1200
1300
1400
1500
1600
HR 0500
HR 0501
HR 0502
HR 0503
HR 0504
HR 0505
HR 0506
HR 0507
HR 0508
HR 0509
HR 0510
HR 0511
HR 0512
HR 0513
HR 0514
HR 0515
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
5-17-5 TABLE COMPARE – TCMP(85)
Operand Data Areas
CD: Compare data
Ladder Symbols
IR, SR, AR, DM, HR, TC, LR, #
TCMP(85)
@TCMP(85)
CD
CD
TB
TB
R
R
TB: First comparison table word
IR, AR, DM, HR, TC, LR
R: Result word
IR, SR, AR, DM, HR, TC, LR
Limitations
TB and TB+15 must be in the same data area.
Description
When the execution condition is OFF, TCMP(85) is not executed. When the execution condition is ON, TCMP(85) compares CD to the content of TB, TB+1,
TB+2, ..., and TB+15. If CD is equal to the content of any of these words, the
corresponding bit in R is set, e.g., if the CD equals the content of TB, bit 00 is
turned ON, if it equals that of TB+1, bit 01 is turned ON, etc. The rest of the bits in
R will be turned OFF.
Flags
ER:
The comparison table (i.e., TB through TB+15) exceeds the data area.
Indirectly addressed DM word is non-existent. (Content of ∗DM word is
not BCD, or the DM area boundary has been exceeded.)
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