F246 Max Signal Frequency Of Encoder 2 Exceeded; F248 Low Battery Voltage - REXROTH ECODRIVE03 Troubleshooting Manual

ECODRIVE03-SGP-03VRS

F246 Max signal frequency of encoder 2 exceeded

F248 Low battery voltage

DOK-ECODR3-SGP-03VRS**-WA01-EN-P
Description of Diagnostic Messages F... and E...
Remedy for:
1. Exchange the encoder cable.
2. Keep the encoder cable well away from power cables.
3. Exchange the drive.
The signal frequency of the encoder 2 (optional encoder) is checked
whether the allowed max. frequency of the encoder interface is exceeded.
Whether, in the case of an excessive frequency, the error F246, Max
signal frequency for encoder 2 exceeded is generated or not, depends
on the setting in the parameter P-0-0185, Function of encoder 2. If the
number 4 for spindle encoder is set there, only the position status of the
optional encoder is cleared to 0. In the other case, the warning F246 is
generated and the position status is cleared to 0.
Cause:
For motors of series MKD and MKE, the absolute position information is
stored by a battery-powered electronic in the motor feedback. The battery
is designed for a 10-year life span. If the battery voltage falls below 3.1 V,
this message appears. The absolute encoder function will still be
preserved for about 2 weeks.
Malfunction in the control of motors and moving
elements!
⇒ Replace the battery as soon as possible.
CAUTION
Instructions for Exchanging Batteries
Have the following tools and accessories ready:
• Torx screwdriver size 10
• Needle-nose pliers, torque wrench
• New packaged battery
Malfunction in the control of motors and moving
elements!
⇒ Turn off the power supply. Make sure it will not be
CAUTION
turned back on. Exchange the battery while the
control voltage (24V) is turned on.
If the control voltage is turned off while the battery is taken out, the
absolute reference point will be lost. Then, the reference point must be
re-established with the command "Set absolute measuring".
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