Programming manual SCU-series
HB-37500-820-10-12F-EN SCU Programming manual
Page 215 of 252
Status: 19.03.2021
DEM (Dynamic Encoder Errors Muting)
Amount:
cf. the chapter
“Safety functions”
Function:
muting of the alarm of encoder diagnostics functions from an adjustable limit
speed.
RESET function: no reset necessary
NOTICE:
The DEM function can only be used for axes that have been set without position
processing.
Operating:
Alarm mute by encoder diagnostics functions, if a settable speed tolerance has been exceeded
while the function was active.
When a safety-function is activated by the same axis, the DEM function is deactivated.
The alarm status of the encoder diagnostics is saved internally.
The status “FALSE”
(encoder
alarm) is deleted, when the speed moderation becomes inactive.
The saved alarm status generates an alarm an alarm, when a different safety function is activated
during the alarm mute.
Output:
The output signalizes the status of this function (only diagnostics). Depending on the damping
function, the output is deleted.
Safey information
The speed threshold of the active safety function should always be much larger than the speed
threshold of other safety functions with the same axis number.
The DEM output should be evaluated. The evaluation is not safety-relevant, and can be carried out
in a non-safe control unit.
Like the safety function that is used, the signal for the activation of the DEM function must be the
highest SIL level or the highest PL level. The signal for the activation of the activation of the DEM
function must be situated on the same axis as the safety function that is used.se sein.