FUNCTION BLOCKS FOR SPEED MONITORING
Safety warning!
An external fault or a malfunction on the Encoder/proximity switch or on its connec-
tions does not necessarily result in a change in the safety status on the normal out-
put on the function block (e.g. "Zero"). Faults or malfunctions on the Encod-
er/proximity switch or in the cabling are, however, detected by the module and man-
aged and specified via the diagnostics bit (error output (Error)) that can be activated
on each function block.
To ensure safety, the diagnostics bit must be used in the configuration program to
initiate possible deactivation of the outputs if the axis is in operation. If there are no
external problems on the Encoder/proximity switch, the "Error" output is 0 (zero).
If there are the following external problems on the Encoder/proximity switch, the "Er-
ror" output is 1 (one):
- Encoder or proximity switch missing.
- One or more connections on the Encoder or proximity switch missing.
- No Encoder supply (only TTL model with external supply).
- Frequency discrepancy between the signals on the Encoder/proximity switch.
- Phase error on the Encoder signals or cycle error on an individual phase.
Figure 48 - Example for speed regulation function block with "Error Out" activated
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