Mitsubishi Electric MELSEC FX3U Programming Manual page 583

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2 : When using a special high speed output adapter for the pulse output destination in an FX
rotation direction signal must be used by the following table output.
When using a built-in transistor output for the pulse output destination in an FX
rotation direction signal must use transistor output.
Special high speed output adapter No.
No. 1 (1st unit)
No. 2 (2nd unit)
3 : "D .b" is available only in FX
available.
4 : This function is supported only in FX
Explanation of function and operation
Command
input
FNC157
PLSV
Caution on writing during RUN
During RUN, avoid writing while PLSV (FNC157) instruction is executed (that is, while pulses are output).
Note that if writing is executed during RUN to a circuit block including FNC157 instruction while pulses are
output, the PLC executes the operation shown below.
During operation with acceleration/deceleration
During operation without acceleration/deceleration Immediately stops pulse output.
*1. Only available for FX
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 FX
3G 3U
Ver.1.00 Ver.2.20
or later or later
and FX
3U
/FX
3U
S D D
1 1 2
*1
Decelerates and stops pulse output.
/FX PLC Ver.2.20 or later and FX
3U 3UC
→ For explanation of the instruction and the contents of function change,
Item
FX
3UC
Acceleration/
Ver.2.20
deceleration
or later
operation function
20 Positioning Control – FNC150 to FNC159
20.6 FNC157 – PLSV / Variable Speed Pulse Output
Pulse output Rotation direction output
=Y000
D
D
2
1
=Y001
D
D
1 2
=Y002
D D
2
1
=Y003
D
D
1 2
C PLCs. However, index modifiers (V and Z) are not
3U
PLCs.
3UC
PLC operation when writing is excuted during RUN while
instruction is executed
PLC.
3G
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
if changes.
D S
1 1
PLC, the
3U
/FX /FX PLC, the
3G 3U 3UC
=Y004
=Y005
=Y006
=Y007
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