FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
4 Before Programming
4.8 Items To Be Observed When Using the Main Unit (Transistor Output)
B - 85
A
Common Items
B
Built-in
Positioning
Functions
Apx.
Example
Connection
4.8 Items To Be Observed When Using the Main Unit (Transistor Output)
1. Pulse output destination devices
Use Y000, Y001, and Y002
*1
transistor outputs of the main unit for the pulse output destination devices.
Do not use the transistor output Y003 of the main unit for positioning instructions. If Y003 is used for a positioning
instruction, PLC failure may occur.
2. Pulse output method
Adjust the pulse output method of the transistor output of the main unit to conform with the command pulse
input method of the servo amplifier (drive unit).
If the pulse output method is not properly adjusted, the servo amplifier (drive unit) may not perform the
intended operation.
For details on the servo amplifier (drive unit), refer to the manual of the product used in your
system.
For details on the pulse output method of the main unit, refer to Subsection 4.6.1.
3. Output pulse frequency (including zero return speed)
If a pulse frequency of more than 100,000 Hz is output from the transistor output terminal of the main unit to
perform the operation, it may cause PLC failure.
The output pulse frequency and the zero return speed should be equal to or less than the maximum frequency
of the servo amplifier (drive unit).
4. Load current
To use a positioning instruction for the transistor output Y000, Y001, or Y002
*1
of the main unit, adjust the
load current of the open collector transistor output to 10 to 100 mA (5 to 24V DC).
*1. Y002 is not available in FX
3G PLC (14-point and 24-point type) and FX3S/FX3GC PLC.
Item Description
Operation voltage range 5 to 24V DC
Operation current range 10 to 100mA
Output pulse frequency 100 kHz or less
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