Mitsubishi MELSEC-A series, Programming Manual

Page: 109 / 508

5. SEQUENCE INSTRUCTIONS
5
−
40
MELSEC-A
5.7.2 No operation (NOP, NOPLF)
The NOPLF instruction can be used with the GPP of which software is
SW4GP-GPPA or SW01X-GPPAE.
Available Device
Bit device Word (16-bit) device Constant Pointer Level
Ca
rr
y
fla
g
Err
o
r
fla
g
X Y M L S B F T C D W R A0 A1 Z V K H P I N
D
igit specification
In
d
e
x
M9012 (M9010, M9011)
O
NOP
When the ladder is displayed, NOP is omitted.
NOPLF
When the ladder is displayed, NOPLF is omitted.
Functions NOP
(1) This is a no-operation instruction and has no effect on the previous operation.
(2) NOP is used in the following cases:
1) To provide space for debugging of sequence programs.
2) To delete an instruction without changing the number of steps. (Overwrite
with NOP)
3) To delete an instruction temporarily.
NOPLF
(1) This is a no-operation instruction and has no effect on the previous operation.
(2) The NOPLF instruction is used to specify page and at a desired point during the
GPP printer output operation.
1) For printing ladder diagrams
•
Page is changed if the NOPLF instruction is given at the end of each
ladder block. The NOPLF instruction given in a ladder block is ignored.
•
The NOPLF instruction given in a ladder block is handled as follows if
conversion is performed in the ladder mode of the GPP.
Deleted when the number of steps increses.
Converted to NOP when the number of steps decreases.
Applicable
CPU
All CPUs