F245 Encoder 2 Failure: Quadrant Error; F246 Max. Signal Frequency Of Encoder 2 Exceeded; F248 Low Battery Voltage - Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS Functional Description

12-10
Diagnostic Message Descriptions

F245 Encoder 2 failure: Quadrant error

F246 Max. signal frequency of encoder 2 exceeded

F248 Low Battery Voltage

The evaluation of the additional optional encoder (encoder 2) is active. In
the evaluation of the sinusoidal input signals of the optional encoder, a
plausibility check is performed between these signals and the counter fed
by these signals. In so doing, an error has been encountered.
Cause:
1. Defective encoder cable
2. Electromagnetic interference on the encoder cable
3. Defective encoder interface
Remedy:
For 1. Replace the encoder cable
For 2. Keep the encoder cable well away from power cables.
For 3. Replace unit (ECODRIVE)
The signal frequency of encoder 2 (optional encoder) is checked to see
whether the allowed max. frequency of the encoder interface has been
exceeded.
If the frequency is higher than allowed, error F246, Max. signal
frequency of encoder 2 exceeded is generated. The "homed" output in
Parameter C010 is turned off.
Cause:
For model MKD and MKE motors, the absolute position information is
stored in the motor encoder electronics with battery backup. The battery
is rated for a 10-year service life. If the battery voltage goes below 2.8 V,
this message is displayed. Encoder functioning is ensured for
approximately another 2 weeks.
Malfunction in the control of motors and moving
elements
Equipment damage can occur.
Replace battery immediately.
CAUTION
Instructions for Replacing Batteries
Have the following tools and accessories ready:
Torx screwdriver size 10
Needle-nose pliers, torque wrench
New battery pack (Mat. No. 257101)
ECODRIVE03-FL*-04VRS
DOK-ECODR3-FL*-04VRS**-FK01-EN-P