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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
6 Mechanical Zero Return (DSZR/ZRN Instruction)
6.2 DOG Search Zero Return (DSZR Instruction)
B - 94
6) CLEAR signal output
This instruction can output the CLEAR signal after stopping at the origin.
If it is necessary to output the CLEAR signal at the completion of zero return, turn on the "CLEAR signal
output function enable" relay (see the following table).
Use an FX
3U/FX3UC PLC Ver.2.20 or later or FX3G PLC to specify the CLEAR signal output device.
a) If it is not necessary to use the CLEAR signal device specification function, or if an FX
3UC PLC below
Ver.2.20 is used.
*1. Use an FX
3U
/FX
3UC
PLC Ver.2.20 or later or FX
3G
PLC to use the "
CLEAR
signal device specification function
enable" relay.
b) If it is necessary to use the CLEAR signal device specification
function:
Turn on the "CLEAR signal device specification function enable"
relay to specify the CLEAR signal output device (output Y) for the pulse output destination device
using the CLEAR signal device specification register.
→ For an example program, refer to Subsection 4.3.4 or Subsection 4.5.1.
7) Zero return speed
Use the devices shown in the following table to set the zero return speed. Be sure to set the zero return
speed so that the relation with the other speeds is "bias speed ≤ zero return speed ≤ maximum speed".
- If "zero return speed > maximum speed", the operation will be performed at the maximum speed.
8) Creep speed
Use the devices shown in the following table to set the creep speed. Be sure to set the creep speed so
that the relation with the other speeds is "bias speed ≤ creep speed ≤ maximum speed".
Pulse output
destination device
Status of "CLEAR
signal output function
enable" relay
Status of "CLEAR signal
device specification function
enable" relay
*1
CLEAR signal device
number
= Y000
M8341=ON M8464=OFF Y004
= Y001
M8351=ON M8465=OFF Y005
= Y002
M8361=ON M8466=OFF Y006
= Y003
M8371=ON M8467=OFF Y007
Pulse output
destination device
Status of "CLEAR
signal output function
enable" relay
Status of "CLEAR signal
device specification function
enable" relay
*1
CLEAR signal device
specification register
= Y000
M8341=ON M8464=ON D 8464
= Y001
M8351=ON M8465=ON D 8465
= Y002
M8361=ON M8466=ON D 8466
= Y003
M8371=ON M8467=ON D 8467
Pulse output
destination device
Bias speed Zero return speed Maximum speed Initial value
= Y000
D8342 D8347,D8346 D8344,D8343
50,000(Hz)
= Y001
D8352 D8357,D8356 D8354,D8353
= Y002
D8362 D8367,D8366 D8364,D8363
= Y003
D8372 D8377,D8376 D8374,D8373
Pulse output
destination device
Bias speed Creep speed Maximum speed Initial value
= Y000
D8342 D8345 D8344,D8343
1,000(Hz)
= Y001
D8352 D8355 D8354,D8353
= Y002
D8362 D8365 D8364,D8363
= Y003
D8372 D8375 D8374,D8373
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1