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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
10 Variable Speed Operation (Variable Speed Pulse Output)-PLSV Instruction
10.3 Function and Operation
B - 137
A
Common Items
B
Built-in
Positioning
Functions
Apx.
Example
Connection
10.3 Function and Operation
The variable speed pulse output instruction changes the speed while using the rotation direction output.
The acceleration/deceleration function applies for the variable speed pulse output (PLSV) instruction, which
makes it possible to specify whether acceleration/deceleration will be used or not.
If an FX
3UC PLC below Ver.2.20 is used, operation will be performed without acceleration/deceleration.
10.3.1 Operation without Acceleration/Deceleration (M8338 = OFF)
If the output pulse frequency value is changed after turning the
acceleration/deceleration function (M8338) OFF, the variable speed
pulse output (PLSV) instruction will change the output frequency without
using acceleration/deceleration.
→ For details on the maximum speed and bias speed, refer to Subsection 4.2.5 and Subsection 4.2.6.
1) For , specify the output pulse frequency.
Even if pulses are being output, the output pulse frequency can be changed freely.
Acceleration/deceleration, however, will not be performed.
2) For , specify the pulse output number in the range of Y000 to Y003.
3) For , specify the rotation direction signal output device number.
When a high-speed output special adapter is used as a destination for pulse output on a FX
3U PLC, use
the output shown in the following table for rotation direction signals.
When a built-in transistor output is used as a destination for pulse output on a FX
3G/FX3U/FX3UC PLC,
use transistor output for signals rotation direction.
Setting range
16-bit operation -32,768 to -1 Hz, 1 to 32,767 Hz
32-bit operation
When a high-speed output special
adapter is used
-200,000 to -1 Hz, 1 to 200,000 Hz
When a transistor output from the
main unit is used
-100,000 to -1 Hz, 1 to 100,000 Hz
High-speed output special
adapter number
Pulse output
destination device
Rotation direction
output
1st adapter
= Y000
= Y004
= Y001
= Y005
2nd adapter
= Y002
= Y006
= Y003
= Y007
S
M8001
FNC 157
PLSV
S
•
D
1
•
D
2
•
M8338
Command
input
ON
S
•
100 250 500 250
Speed
Time
OFF
Instruction
Activation contact
S
S
D
1
D
2
D
1
D
2
D
1
D
2
D
1
D
2
D
1
D
2