Forward Limit And Reverse Limit - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

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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.

rotation limit 2

(Servo amplifier side)

Forward rotation limit 1

Reverse rotation limit 1

The following table lists the corresponding devices. Related devices of axis 4 are available only for the FX5S/FX5U/FX5UC

Forward limit

Reverse limit

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.

29 POSITIONING CONTROL FUNCTION

29.4 Auxiliary Function

rotation limit 1

(CPU module side)

Reverse rotation

Forward limit (axis 1)

Reverse limit (axis 1)

rotation limit 1

(CPU module side)

Forward rotation

High-speed pulse input/output module

First module

Second module

rotation limit 2

(Servo amplifier side)

Third module

Fourth module

Axis 11 Axis 12