Caution - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

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 reading the ABS value. If the instruction drive contact is turned off at the completion of
ABS data reading, 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
5 POSITIONING INSTRUCTION
5.11 Absolute Position Detection System
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