Immediate Stop Of Pulse Output (Pulse Output Stop Command Relay; Designation Of Zero Return Direction (Dszr/Zrn Instruction - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
4.3.2

Immediate Stop of Pulse Output (Pulse Output Stop Command Relay)

During the execution of a positioning instruction, if the pulse output stop command relay is turned on, the
pulses being output will immediately stop.
To output pulses again, turn off the pulse output stop command relay, deactivate (turn off) the positioning
instruction, and then activate the instruction again (turn it on again).
The following table shows the pulse output stop command relay of each pulse output destination device.
Pulse output destination
device
Y000
Y001
*1
Y002
*2
Y003
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
Note:
Use these relays only if immediate stop is absolutely needed to avoid dangers. Since the motor is
immediately stopped, use of these relays may damage the system. For normal STOP operation (decelerate
to stop), use the "instruction OFF" function or "forward/reverse limit relay."
However, note that if the PLSV instruction is used together with the "instruction OFF" function or the "forward/
reverse limit relay" in the M8338 = OFF mode (operation without acceleration/deceleration), operation will
immediately stop.
4.3.3

Designation of Zero Return Direction (DSZR/ZRN Instruction)

Use the DSZR instruction (zero return instruction with DOG search function) or ZRN instruction (zero return
instruction) to specify the zero return direction
Reverse rotation limit 2
(Servo amplifier side)
Servo motor
*1. If the DSZR instruction (zero return instruction with DOG search function) is used, zero return will be
performed in the direction of the first operation.
1. Zero return instruction with DOG search function (DSZR instruction)
Turn on or off the zero return direction specification relay shown in the following table to specify the zero
return direction.
Pulse output
destination device
Y000
Y001
*2
Y002
*3
Y003
*2. Y002 is not available in FX
*3. Y003 is available only when two high-speed output special adapters are connected to the FX
B - 58
PLC User's Manual - Positioning Control Edition
Pulse output stop
command relay
M8349
M8359
M8369
M8379
PLC (14-point and 24-point type) and FX
3G
Reverse rotation limit 1
(Programmable
controller side)
LSR
Reverse rotation
Zero return direction
specification relay
M8342
M8352
M8362
M8372
PLC (14-point and 24-point type) and FX
3G
4.3 Various Special Relays for Operation Commands
During pulse outputting operation, if the pulse output stop
command relay of the corresponding pulse output
destination device is turned on, the pulse outputting
operation will immediately stop.
*1 . The zero return direction depends on the instruction.
For operation of DSZR instruction, refer to Section 6.2.
For operation of ZRN instruction, refer to Section 6.3.
Forward rotation limit 1
(Programmable
controller side)
LSF
Forward rotation
Description of setting
To perform zero return in the forward
To perform zero return in the reverse
4 Before Programming
Operation
/FX PLC.
3S 3GC
Forward rotation limit 2
(Servo amplifier side)
rotation direction: Turn on the relay.
rotation direction: Turn off the relay.
/FX PLC.
3S 3GC
PLC.
3U
PLC.
3U