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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 - 45
A
Common Items
B
Built-in
Positioning
Functions
Apx.
Example
Connection
4.2.4 Setting of Creep Speed (DSZR/ZRN Instruction)
Use the related device or the operand of the instruction to set the creep speed. The creep speed setting
range is shown in the following table.
Be sure to set the creep speed so that the relation with the other speeds is "bias speed ≤ creep speed ≤
32767 Hz
*1
".
→ For operation of DSZR instruction, refer to Section 6.2.
→ For operation of ZRN instruction, refer to Section 6.3.
*1. If the maximum speed is set to less than 32767 Hz, note that this value (32767 Hz) will automatically
be changed to the maximum speed.
*2. Y002 (pulse output destination) cannot be specified when the 14-point or 24-point type FX
3G PLC is
connected.
*3. Devices related to Y003 (pulse output destination) are only valid if two FX
3U-2HSY-ADP adapters are
connected to the FX
3U PLC.
4.2.5 Setting of Maximum Speed
Set the maximum speed to determine the upper limit value for the output pulse frequency and the zero return
speed.
Use the devices shown in the following table to determine the maximum speed for each pulse output
destination device.
*1. Y002 (pulse output destination) cannot be specified when the 14-point or 24-point type FX
3G PLC is
connected.
*2. Devices related to Y003 (pulse output destination) are only valid if two FX
3U-2HSY-ADP adapters are
connected to the FX
3U PLC.
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 or
related
device
Setting range
Instruction format
16-bit
operation
(Hz)
32-bit
operation
(Hz)
DSZR
instru-
ction
=Y000
D8345
10 to 32767
Initial value: 1000
=Y001
D8355
=Y002
*2
D8365
=Y003
*3
D8375
ZRN instruction 10 to 32767
Pulse output
destination device
Maximum
speed
Initial value
Setting range
Transistor output of main
unit
High-speed output special
adapter
Y000 D8344,D8343
100,000Hz
10 to 100,000 Hz:
If the value is set to 9 Hz or
less, the maximum speed will
be automatically set to 10 Hz.
10 to 200,000 Hz:
If the value is set to 9 Hz or
less, the maximum speed will
be automatically set to 10 Hz.
Y001 D8354,D8353
Y002
*1
D8364,D8363
Y003
*2
D8374,D8373
D
1
DSZR S
1
•
S
2
•
D
1
•
D
2
•
D
1
D
1
D
1
S
2
ZRN S
1
•
S
2
•
S
3
•
D
•