Mitsubishi Electric MELDAS C6 Programming Manual page 121

ORB ... Parallel connection of blocks
Bit device
X Y M L F B SB T SM V T
A block
Function
(1) OR operation of the A block and B block is executed, and the operation results are obtained.
(2) ORB connects circuit blocks with two or more contacts in parallel. Use OR or ORI to connect
circuit blocks with only one contact in parallel.
X0
10
X2
X4
(3) The ORB symbol is a connection symbol instead of a contact symbol.
(4) When consecutively writing ORB, a max. of 7 commands (8 blocks) can be written. The PLC
cannot execute a correct operation if 8 or more commands are written consecutively.
7. Basic Commands
ORB
Usable device
Word device
C D R W SW Z SD K
B block
OR or ORI is used for
the one contact
parallel connection.
X1
X3
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Con-
stant
H
ORB
Coding
No. of
Y10
steps
10
11
12
13
14
15
16
17
Digit
No. of
Pointer desig- Index
steps
nation
P
1
Com-
Device
mand
LD X0
AND X1
LD X2
AND X3
ORB
ORI X4
OUT Y10