REXROTH DIAX04, Troubleshooting Manual

Page: 35 / 114

DIAX04 ELS-06VRS Description of Diagnostic Letters F... and E...
4-7
DOK-DIAX04-ELS-06VRS**-WA01-EN-P
Remedy for:
1. Check S-0-0115, Position feedback 2 type parameter and
S-0-0117, Resolution of feedback 2 .
2. Check S-0-0121, S-0-0122, Input/Output revolutions of load gear
and S-0-0123, Feed constant .
3. Increase S-0-0391, Monitoring window feedback 2; switch off when
using a gearbox with a large amount of slip.
4. Replace encoder cable.
5. Reduce the velocity.
6. Set S-0-0391, Monitoring window feedback 2 to 0 (de-activate
monitoring function).
7. Perform P-0-0012, C300 Command ’Set absolute measurement’ .
See also the functional description "Actual feedback value monitoring".
F237 Excessive position command difference
Cause:
When the drive is operating in position control, incoming position
command values are monitored. If the velocity required of the drive by two
successive position command values is greater than or equal to the value
in
S-0-0091, Bipolar velocity limit value , position command value
monitoring is initiated. The Excessive position command value is
stored in parameter P-0-0010 . The last valid position command value
is stored in parameter P-0-0011 .
If position data are to be processed in modulo format, then the
interpretation of the command is also dependent on the value set in
S-0-
0393, Command value mode for modulo format. The parameter
should be set for the "shortest path" (0).
Remedy:
Compare S-0-0091, Bipolar velocity limit value with the velocity in the
program and adjust to match it, if necessary.
F242 Encoder 2 failure: signal amplitude wrong
Cause:
The analog signals of the measuring system are monitored according to
two criteria:
1. The pointer length of the amplified signals, which is calculated
from the sine and cosine signals, must be > 1 V.
2. The maximum pointer length resulting from the sine and cosine
signals must not exceed 11.8 V.
pointer length = sin + cos
2 2
Fig. 4-3: Pointer length