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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
4 Before Programming
4.3 Various Special Relays for Operation Commands
B - 52
CLEAR signal device specification method:
1) Write the CLEAR signal output (Y) device number in the "CLEAR signal device specification" register with
a hexadecimal number (expressed in octal numbers).
e.g. setting H0010 means Y010. When setting H0008, an operation error occurs because Y008 does not
exist.
2) Turn on the "CLEAR signal output function enable" relay and "CLEAR signal device specification function
enable" relay to specify the CLEAR signal device.
3) Execute the DSZR instruction (zero return instruction with DOG search function) or ZRN instruction (zero
return instruction).
Example program:
The following figure shows a program that can specify Y010 as the CLEAR signal output device for Y000
(pulse output destination device):
4.3.5 Change in Logic of Near-Point (DOG) Signal (DSZR Instruction)
Turn on or off the "DOG signal logic reverse" relay to specify the logic of the near-point (DOG) signal of the
DSZR instruction (zero return instruction with DOG search function). Use the operand ( ) of the
instruction to specify the near-point (DOG) signal.
→ For operation of DSZR instruction, refer to Section 6.2.
*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.
4.3.6 Change in Logic of Zero-Phase Signal (DSZR Instruction)
Turn on or off the "Zero point signal logic reverse" relay to specify the logic of the zero-phase signal of the
DSZR instruction (zero return instruction with dog search function). Use the operand ( ) of the
instruction to specify the zero-phase signal.
→ For operation of DSZR instruction, refer to Section 6.2.
*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.
Pulse output
destination device
"DOG signal logic
reverse" relay
Description of setting
Y000 M8345
OFF: Positive logic (Turning on the input will turn on the near-
point signal.)
ON: Negative logic (Turning off the input will turn on the near-
point signal.)
Y001 M8355
Y002
*1
M8365
Y003
*2
M8375
Pulse output
destination device
"Zero point signal
logic reverse" relay
Description of setting
Y000 M8346
OFF: Positive logic (Turning on the input will turn on the zero-
phase signal.)
ON: Negative logic (Turning off the input will turn on the zero-
phase signal.)
Y001 M8356
Y002
*1
M8366
Y003
*2
M8376
M8000
RUN
monitor
Specifies the Y010 as the CLEAR signal output device for
Y000 (pulse output destination device).
Turns on "CLEAR signal device specification function enable"
relay for Y000 (pulse output destination device).
Turns on the "CLEAR signal output function enable" relay.
D8464H0010
FNC 12
MOVP
M8464
M8341
S
1
S
2