Mitsubishi FX3U Series Programming Manual page 537

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Explanation of function and operation
Command
input
FNC157
PLSV
Caution on write during RUN
Avoid write during RUN while PLSV (FNC157) instruction is executed (that is, while pulses are output).
Note that the PLC executes the operation shown below if write during RUN is executed to a circuit block
including FNC157 instruction while pulses are output.
During operation with acceleration/deceleration
During operation without acceleration/deceleration Immediately stops pulse output.
*1. Supported in Ver.2.00 or later
Function change depending on the version
The function of the FNC157 instruction is changed depending on the version as shown in the table below.
Applicable version
FX
3U
Ver.2.00 or Ver.2.00 or
later
S D D
1 2
*1
→ For explanation of the instruction and the contents of function change,
Item
FX
3UC
Acceleration/
deceleration
later
operation function
20 Positioning Control – FNC150 to FNC159
20.6 FNC157 – PLSV / Variable Speed Pulse Output
PLC operation when write during RUN is executed while
instruction is executed
Decelerates and stops pulse output.
refer to the Positioning Control Edition.
Outline of function
When M8338 is set to ON, the PLC accelerates or decelerates up to
S in the acceleration or deceleration time corresponding to
1
D if S changes.
1 1
11
12
13
14
15
16
17
18
19
20
535