Function Commands - Mitsubishi Electric MELDAS 60 Series Programming Manual

Plc programming
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6.1.2 Function Commands

(1) Comparison commands
Process
Class
unit
16-bit
=
32-bit
16-bit
>
32-bit
16-bit
<
32-bit
Command
Symbol
sign
LD=
=
S1 S2
AND=
=
S1 S2
OR=
=
S1 S2
LDD=
D =
S1 S2
ANDD=
S1 S2
D =
ORD=
S1 S2
D =
LD>
>
S1 S2
AND>
>
S1 S2
OR>
>
S1 S2
LDD>
D >
S1 S2
ANDD>
S1 S2
D >
ORD>
S1 S2
D >
LD<
<
S1 S2
AND<
<
S1 S2
OR<
<
S1 S2
LDD<
D <
S1 S2
ANDD<
S1 S2
D <
ORD<
S1 S2
D <
Process details
Continuity state when (S1) = (S2)
Non-continuity state when (S1) =/ (S2)
Continuity state when
(S1+1, S1)=(S2+1, S2)
Non-continuity state when
(S1+1, S1) = (S2+1, S2)
Continuity state when (S1) > (S2)
Non-continuity state when (S1) <= (S2)
Continuity state when
(S1+1, S1) > (S2+1, S2)
Non-continuity state when
(S1+1, S1) <= (S2+1, S2)
Continuity state when (S1) < (S2)
Non-continuity state when (S1) >= (S2)
Continuity state when
(S1+1, S1) < (S2+1, S2)
Non-continuity state when
(S1+1, S1) >= (S2+1, S2)
- 24 -
6. Explanation of Commands
No.
of
steps
3
3
3
3~4
3~4
3~4
3
3
3
3~4
3~4
3~4
3
3
3
3~4
3~4
3~4
Page
70
70
70
72
72
72
74
74
74
76
76
76
78
78
78
80
80
80

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