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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
4 Before Programming
4.2 Setting of Various Items Regarding Speeds
B - 43
A
Common Items
B
Built-in
Positioning
Functions
Apx.
Example
Connection
4.2.2 Setting of Output Pulse Frequency (DVIT, PLSV, DRVI, and DRVA Instructions)
Set the output pulse frequency using the operand of each instruction. In this case, the setting range depends
on the instruction (see the following table).
However, even in the setting range of each instruction, if the set value of the output pulse frequency is more
than the maximum speed value, the operation will be performed at the maximum speed. If the set value of
the output pulse frequency is less than the bias speed value, the operation will be performed at the bias
speed.
→ For operation of DVIT instruction, refer to Chapter 9.
→ For operation of PLSV instruction, refer to Chapter 10.
→ For operation of DRVI or DRVA instruction, refer to Chapter 8.
*1. If FX
3U-2HSY-ADP is not used, note that the frequency value cannot be more than 100,000 Hz.
*2. If FX
3U-2HSY-ADP is not used, note that the frequency value cannot be less than -100,000 Hz.
*3. Only available for FX
3U and FX3UC PLCs.
Caution:
• To use the main unit (transistor output), set the output pulse frequency (absolute value) to 100,000 Hz or less.
If more than 100,000 Hz is output from the transistor output of the main unit to perform operation, it may cause PLC
failure.
• Set the output pulse frequency so that the output pulse frequency value is less than the maximum frequency value
of the servo amplifier (driver unit).
Instruction Operand
Setting range
Instruction format
16-bit operation
(Hz)
32-bit operation
(Hz)
DVIT
instruction
*3
10 to 32767
10 to 200,000
*1
PLSV
instruction
-32768 to -1,
+1 to 32767
-200,000
*2
to -1,
+1 to 200,000
*1
DRVI
instruction
10 to 32767
10 to 200,000
*1
DRVA
instruction
10 to 32767
10 to 200,000
*1
S
2
DVIT S
1
•
S
2
•
D
1
•
D
2
•
S
PLSV S
•
D
1
•
D
2
•
S
2
DRVI S
1
•
S
2
•
D
1
•
D
2
•
S
2
DRVA S
1
•
S
2
•
D
1
•
D
2
•