Instruction Manual
SAFELINE VARIO Diagnostics
30
2 Rack-Diagnostics
Possible causes of shut downs:
Exceeding the parameterized speed:
The shutdown frequency is displayed in the Latch window.
Exceeding the parameterized positions:
The position and increments are displayed in the Latch window.
Encoder error:
Caused by broken wire at one or more signals.
Sin/Cos = 0V:
Caused while sine and cosine differential voltages of <60mV.
This can for example arise by erected reading head of linear encoders.
Track comparison error:
The tracks Sin / Cos or A / B are monitored through 2 channels in the speed monitoring.
Two reasons, besides from internal hardware failure, can cause this error:
• At very different frequencies (> 20%) over a period of> 2.5 seconds.
• If a track stands still and the other track gives frequencies> 5x standstill frequency
about a timeof > 2.5 seconds.
Both can be provoked by strong control behavior of the drive at a standstill.
Rectification:
implement Standstill monitoring by position monitoring.
The standstill frequency has to be parameterized as high as possible corresponding
to about 1/6 of the reduced speed.
Error position comparison:
The increments of the tracks Sin / Cos or A / B are monitored through 2 channels at the position
monitoring. If the position deviates strongly from each other, it comes to a position comparison
error.
Cause, besides from internal hardware failure:
The control inputs F11, F12, F13, MT, etc. can be switched between frequency measurement and
position monitoring by increments if the position control is selected in the designer. If the control
inputs are all turned off, the position control is shifted.
In the event shifting to position monitoring happens when the drive is still running, an error on this
position comparison can occur, since the changeover will not be in perfect syncronized. The
application should ensure that the drive is at standstill, when switching to position control.
L/R-change >10kHz:
Only for position control possible. When direction changes faster than 10 kHz accordingly, the
error occurs. Has only been observed so far as internal hardware errors of the speed monitoring.
Sin²+Cos² unequal 1:
Only in SL VARIO DSV modules possible. If the option is selected in the designer and the Sin / Cos
signal is not equivalent to Sin² + cos² = 1, this error occurs, for example, on EMC problems. .
