IAI America SCON-CA User Manual

Page 193

Chapter 6 Power-saving Function (Auto Servo-motor OFF Function)

183

Chapter 6 Power-saving Function (Auto Servo-motor OFF

Function)

The controller has the automatic servo OFF function to save power consumption while the

actuator is stopped. Read the description in this chapter carefully to save power so that the

controller can be operated safely.

The servo is automatically turned OFF after a certain period from completion of positioning. The

next positioning command is issued to turn the servo ON automatically and achieve the

positioning. No holding current flows in the stop state to allow the power consumption to be

saved.

Three periods from completion of positioning to servo OFF can be set as parameters. The

period used for the automatic servo OFF is specified in the position table.

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Warning: Do not use this function if the automatic servo OFF is followed by pitch feed

(relative movement).

Servo ON/OFF may cause slight position shift to occur. If position shift occurs

due to external force during servo OFF, positioning to the correct position is

disabled. It is because pitch feed is operated based on the position at start

used as the base point.

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Caution: This function is ineffective for pressing. Do not use. It becomes effective at

completion of positioning. In pressing, the function becomes effective only

when miss-pressing occurs (the status at the completion of operation without

pressing is the same as that at the completion of positioning).

No retaining torque is provided in automatic servo-off. The actuator can

move with an external force. Pay attention to the interference to the

peripherals and the safety in the installation.

This function cannot be utilized in Pulse Train Mode.

(1) Setting of periods taken until automatic servo OFF

Three periods from completion of positioning to automatic servo OFF can be set in the

following parameters in seconds [sec].

Parameter No.

Description

Auto Servo Motor OFF Delay Time 1 (Unit: sec)

Auto Servo Motor OFF Delay Time 2 (Unit: sec)

Auto Servo Motor OFF Delay Time 3 (Unit: sec)

(2) Set of power-saving mode

Select a proper power-saving mode from the conditions below. Set the corresponding value

in the stop mode of the position table.

[Refer to 14) Stop mode in 3.2.1 Set of Position Table.]

Set Value Operation after completion of positioning Parameter No.

Servo ON not changed

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Automatic servo OFF after certain period