Omron CS1W-MC221 - 02-2008 Operation Manual page 552

Troubleshooting Tables
No. Problem
19 Origin search
cannot be
executed.
20
21
22
23
24
25
26
27
28
29
30
Probable causes
An error or warning has been
generated.
The MC Unit's origin proximity
input is wired incorrectly.
The Servo Driver phase Z is
incorrectly wired to the MC
Unit.
The direction of rotation does
not match the direction of the
limit input.
The limit input is wired
incorrectly.
Origin search cannot be
executed because the Unit is
in Automatic Mode.
Instructions cannot be
received from the ladder
program because the
Teaching Box is in T. BOX
ENABLED or T. BOX
RESERVED Mode.
Another axis control bit is ON
at the same time.
Not entering the in-position
range.
The low-speed origin search
feed rate is too fast.
The parameters are set
incorrectly.
The MC Unit is defective.
Items to check
Check the contents of the error
or warning.
Use the Teaching Box's input
signal monitor function to check
whether the sensors are turning
ON and OFF normally.
Check the phase Z wiring.
If axis rotation is reaching the
mechanical limit without revers-
ing direction, use the Teaching
Box to check whether the limit
inputs are turning ON and OFF
normally.
Check the limit input wiring.
Monitor the Automatic Mode Bit.
Set the mode to Program Mode
and forcibly set only the Servo-
lock Bit.
Disconnect the Teaching Box
and check again.
Check whether another axis
control bit is ON at the same
time.
Try executing origin using the
Teaching Box.
Is the MC parameter's
in-position width too narrow?
Is the Servo Driver gain too low?
Is the servo speed reference
offset incorrect?
Check the low-speed origin
search feed rate.
Check the MC Unit parameters
with the CX-Motion.
If the single-direction mode is
specified for a system in which
limits are set for both sides, for
example, an error will occur and
operation will stop when a limit is
detected.
---
Section 12-1
Remedy
If there is an error or
warning, then follow the
instructions.
Correct the wiring.
Correct the wiring.
Correct the limit input
wiring.
Correct the limit input
wiring.
Set the mode to
Automatic Mode and then
execute servo-lock.
(Change the ladder
program.)
Disconnect the Teaching
Box or put the Teaching
Box into T. BOX LIMITED
Mode.
Turn OFF the other axis
control bit and turn ON
the origin search bit.
(Change the ladder
program.)
Increase the MC
parameter's in-position
width.
Increase the Servo
Driver/MC Unit gain.
Adjust the servo speed
reference offset (zero
balance).
Decrease the low-speed
origin search feed rate.
Set the parameters
correctly, transfer them to
the MC Unit, and write
them to flash memory.
Replace the MC Unit.
525