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LDBIT, ANDBIT, ORBIT
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{ LDBIT, ANDBIT, ORBIT ... Bit test of "A" contact handling
Usable device
Bit device Word device
Con-
stant
Pointer Level
X Y M L SM F T C D R Z K H P N
Digit
desig-
nation
No. of
steps
Index
S1
n
2
ORBIT
ANDBIT
LDBIT
< =
n
S1
< = nS1
< =
n
S1
(Note)
(Note)
(Note)
Setting data
n
No. of device to
execute bit test
S1
Bit to execute bit
test
In programming with the MELSEC PLC development tool (GX Developer), the
comparison operation command mentioned above is subsutituted and used.
(Note)
Function
(1) A bit test of the 16-bit device is executed with "A" contact handling.
(2) The bit test results are as shown below.
Condition Bit test results
When test bit is 1 Continuity
When test bit is 0 Non-continuity
Execution conditions
The execution conditions for LDBIT, ANDBIT and ORBIT are as shown below.
Condition Execution conditions
LDBIT Executed per scan
ANDBIT Executed only when previous
contact command is ON
ORBIT Executed per scan