Mitsubishi Electric MELSEC iQ-F FX5 - Forward limit and reverse limit

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29 POSITIONING CONTROL FUNCTION
29.4 Auxiliary Function
Forward limit and reverse limit
When using the servo motor, the forward rotation limit and the reverse rotation limit can be set for the servo amplifier.
To use the DOG search function for OPR, or to set the forward rotation limit or the reverse rotation limit for operations other
than OPR using the CPU module, set the forward rotation limit 1 (LSF) and reverse rotation limit 1 (LSR) for the CPU module
so that these limit switches can be activated before the forward rotation limit 2 or reverse rotation limit 2 of the servo amplifier.
As shown in the following figure, interlock the forward rotation limit 1 (LSF) with the forward limit, and the reverse rotation limit
1 (LSR) with the reverse limit.
The following table lists the corresponding devices. Related devices of axis 4 are available only for the FX5S/FX5U/FX5UC
CPU module.
Precautions
If the forward rotation limit 1 (LSF) and the reverse rotation limit 1 (LSR) cannot be set, observe the following items:
• Even if forward rotation limit 2 or reverse rotation limit 2 turns on and the servo motor is automatically stopped, the
positioning instruction currently being driven cannot recognize the motor being stopped. Therefore, pulses will be
continuously output until the instruction is deactivated.
• The dog search function cannot be used.
Name CPU module High-speed pulse input/output module
First module Second module Third module Fourth module
Axis 1 Axis 2 Axis 3 Axis 4 Axis 5 Axis 6 Axis 7 Axis 8 Axis 9 Axis 10 Axis 11 Axis 12
Forward limit SM5660 SM5661 SM5662 SM5663 SM5664 SM5665 SM5666 SM5667 SM5668 SM5669 SM5670 SM5671
Reverse limit SM5676 SM5677 SM5678 SM5679 SM5680 SM5681 SM5682 SM5683 SM5684 SM5685 SM5686 SM5687
Reverse
rotation limit 2
(Servo amplifier side)
Reverse
rotation limit 1
(CPU module side)
Forward
rotation limit 1
(CPU module side)
Forward
rotation limit 2
(Servo amplifier side)
LSR
LSF
Servo motor
Reverse rotation Forward rotation
Forward rotation limit 1
SM5660
Forward limit (axis 1)
Reverse rotation limit 1
SM5676
Reverse limit (axis 1)