HEIDENHAIN PWM 20 - Manual (Page 45)

46 HEIDENHAIN ATS Software User's Manual
Status display Each time position data is transferred, status information is included and evaluated.
Depending on the encoder model, information on encoder alarms and warnings and on the
quality of the incremental signal are available.
The EnDat interface allows for extensive monitoring of the encoder. An alarm becomes active
if there is a malfunction in the encoder that is presumably causing incorrect position values.
Some examples of alarms:
 Failure of the light unit
 Encoder signal amplitude too small / too large
 Incorrect position value
 Supply voltage too high / too low
 Current consumption is excessive
Warnings indicate that certain tolerances of the encoder were reached or exceeded
(e.g. speed, control reserve of the light unit), but the position value is not incorrect. If a warning
is displayed the encoder concerned should be inspected or exchanged as soon as possible in
order to avoid downtimes.
Some examples of warnings:
 Frequency exceeded
 Temperature exceeded
 Control reserve
 Illumination
etc.
1 The encoder status is displayed in shortened form (group signal) in the lower area of the
position display screen as colored LED symbols.
2 Use the magnifying glass symbol to display detailed information.