F237 Excessive Position Command Difference; F242 Encoder 2 Failure: Signal Amplitude Wrong - Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS Functional Description

ECODRIVE03-FL*-04VRS

F237 Excessive position command difference

F242 Encoder 2 failure: Signal amplitude wrong

DOK-ECODR3-FL*-04VRS**-FK01-EN-P
Cause:
The position command values created by the position loop must be
monitored. If two position command values received in succession
request the drive to produce a velocity that is greater than or equal to the
value in Parameter A106, Maximum Velocity, the position command
value monitoring function is activated.
Cause:
The analog signals of an optional measurement system are used for high
resolution analysis of that measurement system. These signals are
monitored according to two criteria:
1. The pointer length, determined from the sine and cosine signals,
must be greater than 1 V.
2. The maximum pointer length resulting from the sine and cosine
signals must not exceed 11.8 V.
pointerlen
Fig. 12-4: Pointer Length
Fig. 12-5: Correct Signal Amplitude
Example:
Ucos = -6.5 V
Usin = 6.5 V
(
=
Pointerlen gth 6
Remedy:
1. Check the measurement system cable.
2. Check the measurement system.
Diagnostic Message Descriptions
= +
gth sin ² cos
)
2
, + , 2 ,
5V 6 5V 9 2V
12-9
²
Dg5004a1_AE.WMF