342
D > =
S2
S1
D < =
S2
S1
D < >
S2
S1
D <
S2
S1
D >
S2
S1
D =
S2
S1
S2
S1
D > =
D < =
S2
S1
D < >
S2
S1
D <
S2
S1
D >
S2
S1
D =
S2
S1
S2
S1
D > =
S2
S1
D < =
S2
S1
D < >
S2
S1
D <
S2
S1
D >
S2
S1
D =
FNC
224
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
FNC
225
FNC
226
FNC
228
FNC
229
FNC
230
FNC
232
FNC
233
FNC
234
FNC
236
FNC
237
FNC
238
FNC
240
FNC
241
FNC
242
FNC
244
FNC
245
FNC
246
Y0
D<> C235 K10
D<=
D100
D200
X0
Y1
＝
K100
X1
D0
S1
S2
X Y M S
D.b R.b
KnX KnY
KnM KnS
T C
D,R
V,Z
UnG
K,H
E
" $"
S1
S2
S1
S2
S1
S2
Since the programming software Ladder Master S at the monitoring mode could not to read the status at the
special module’s BFM directly, the operand in the instruction which is appointed to the UnG will not have the
correct value to display. Furthermore, that in-line comparison could not display the result. However, the logical
processing at the PLC is correct.
Operand
Devices
Parallel In-line Compare, Connect Up if
(S1) ≤ (S2)
Parallel In-line Compare, Connect Up if
(S1) ≥ (S2)
S1 : the compare value #1
S2 : the compare value #2
When the content value of D0 = K100 and X0 = “ON”, Y0 = “ON”.
When X1 = “ON” and the present value of C235 ≠ K10, Y1 = “ON”.
Besides, when the content value of (D101, D100) ≤ the content
value of (D201, D200), Y0 = “ON” too.
Initial In-line Compare, Connect Up if
(S1) = (S2)
Initial In-line Compare, Connect Up if
(S1) > (S2)
Initial In-line Compare, Connect Up if
(S1) < (S2)
Initial In-line Compare, Connect Up if
(S1) ≠ (S2)
Initial In-line Compare, Connect Up if
(S1) ≤ (S2)
Initial In-line Compare, Connect Up if
(S1) ≥ (S2)
Serial In-line Compare, Connect Up if
(S1) = (S2)
Serial In-line Compare, Connect Up if
(S1) > (S2)
Serial In-line Compare, Connect Up if
(S1) < (S2)
Serial In-line Compare, Connect Up if
(S1) ≠ (S2)
Serial In-line Compare, Connect Up if
(S1) ≤ (S2)
Serial In-line Compare, Connect Up if
(S1) ≥ (S2)
Parallel In-line Compare, Connect Up if
(S1) = (S2)
Parallel In-line Compare, Connect Up if
(S1) > (S2)
Parallel In-line Compare, Connect Up if
(S1) < (S2)
Parallel In-line Compare, Connect Up if
(S1) ≠ (S2)
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