KEB COMBIVERT F5 Instruction Manual - page 11
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Description of the Interface
Clock signal
Data
Monoflop
Position data
P: Parallel position data
T: Period
Tp: Clock interruption up to the next request
tm:
Pulse duration of the monoflop
tv: Deceleration time
D
high
:
Most significant position bit
D
low
:
Least significant position bit
Figure 4:
Serial data transmission with SSI encoder
3.4.2.2 Encoder breakage recognition
An error bit is evaluated for monitoring of the encoder at channel 2. The monitoring is switched
on/off with parameter Ec.42 (Ec.20 up to V2.8). The encoder breakage recognition triggers an
„error! encoder 2“ (value 34).
For encoder breakage detection the encoder needs to send a so-called Power failure bit and
the evaluation with Ec24 "SSI power failure bit" has to be enabled.