Precautions; Replacing The Position Driver And The Motor - Omron OMNUC FND Series User Manual

Application
For details on the operating procedures for this device type, refer to the T eaching Box (For Position
Drivers) Operating Manual (W354) .

4-5-2 Precautions

When performing checks of the inputs and outputs following error generation, there is a
possibility that the Position Driver will operate unexpectedly or suddenly stop. Be sure to
take the following precautions. Do not perform any operations or procedures not
described in this manual.
j Precautions
When checking for breaks in cables be sure to disconnect the wiring first. With the wiring is connected,
there is still a possibility of continuity caused by a return circuit, even if a continuity check is performed.
If the encoder signal goes out, the Motor will run out of control, and an error will be generated. When
investigating the encoder signal, remove the Motor from the mechanical system first.
When measuring output from the encoder, take the measurement at E0V (0-V encoder power supply)
as a basis. By measuring the differential between CH1 and CH2 with an oscilloscope, the effects of
noise can be offset.
Before performing checks, ensure that nobody is inside the mechanical equipment, and that if the
Motor runs out of control, no damage will be caused. Also, in preparation for the unlikely event of the
Motor running out of control, before performing checks for errors, first check that an emergency stop
can be performed for the machinery.

4-5-3 Replacing the Position Driver and the Motor

Use the following procedure to replace the Position Driver or Motor.
j Replacing the FND-X Position Driver
1. Make a copy of the Position Driver parameters.
Using the Position Driver operation keys, display all of the parameters and create a written record
of them. (Refer to 7-2 Parameter Settings Tables .)
2. Replace the Position Driver.
With the CompoBus/S-type, set the communications unit number switch to the original FND-X set-
ting.
3. Set the Position Driver parameters.
With Personal Computer Monitoring Software:
Using the Personal Computer Monitoring Software, transfer all the parameters saved at the per-
sonal computer to the Position Driver.
Without Personal Computer Monitoring Software:
Using the Position Driver operation keys, recreate all the parameter settings recorded in step 1.
4. Perform origin teaching.
If there is no origin compensation because, for example, the backup copy of the parameters was
made at the design stage, it will be necessary to perform origin teaching.
Use the following procedure to perform origin teaching.
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Chapter 4
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