Some error sources belong to the alarm bit "position value faulty" (bit 2), i.e. they
are an extension of this alarm bit and provide a more precise error cause.
Some error sources belong to battery-buffered devices and sometimes require a
certain action from the user so that the position value remains reliable.
(also see 6.1.9 „Operation of EnDat multiturn encoders with battery buffering“,
page 255)
6.1.10.4 Encoder warning messages
Some encoders send warning messages, which are only displayed by the encoder
evaluation (just the same as error messages). The position value is (still) reliable
for warnings. The following are examples of some error messages of common,
supported encoder types
Endat: 16 bit value "warnings“ to address 1 in memory area "operating condition“ of the encoder
Control reserve LED reached
Battery charge too low
No battery is connected or the battery voltage has dropped below the limit value (e.g. 2.8V +/-
0.2V, see encoder data sheet) while the encoder is being supplied with the main voltage.
As long as the encoder is supplied by the main voltage, the encoder remains fully functional
and the position value remains reliable.
After changing or connecting the buffer battery, the warning can be reset by switching the en-
coder type in ec16 off and on again.
BiSS Hengstler Acuro : Error bit in position data word
OptoAsic temperature exceeded or fall below
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