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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
6 Mechanical Zero Return (DSZR/ZRN Instruction)
6.3 Zero Return (ZRN Instruction)
B - 104
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 of
below Ver.2.20 is used:
*1. Use an FX3U/FX3UC PLC Ver.2.20 or later or FX3G 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 the example of a program, refer to Subsection 4.3.4 or Subsection 4.5.1.
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
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
D
1
D
1
D
1
D
1
D
1
D
1
D
1
D
1