Caution - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Hide thumbs Also See for MELSEC iQ-F FX5:

Table of Contents

Caution

For details on the servo amplifier, refer to the manual for each servo amplifier.

• Set the timing sequence for powering on your system so that the power of the PLC is turned on after the power of the servo

amplifier, or that power is turned on at the same time.

• Leave the drive contact ON after read the ABS value. If the instruction drive contact is turned off at the completion of ABS

data read, the servo-ON (SON) signal will be turned off, and the operation will not be performed.

• If the drive contact is turned off during data reading, data reading will be stopped.

• If data communication with the servo amplifier fails, the failure is not detected as an error. Thus, monitor the error using the

time-out error detection timer.

• When using the DABS instruction, set the rotation direction of the servo motor as follows. If the setting is incorrect, the

current value controlled by the PLC may not match with the sign (positive or negative) in the servo amplifier after the ABS

value is read.

Rotation direction

Current value is increased by forward rotation pulses

Current value is decreased by reverse rotation pulses

Setting in servo amplifier

Forward rotation (CCW) when forward rotation pulses are input

Reverse rotation (CW) when reverse rotation pulses are input

Forward rotation (CW) when reverse rotation pulses are input

Reverse rotation (CCW) when forward rotation pulses are input

31 POSITIONING INSTRUCTION

31.11 Absolute Position Detection System