Eliminated from:
HighLine with firmware version V05.01 or higher
Behaviour of the new version?
The bManJogPos and bManJogNeg signals have priority over the bReleaseLimitSwitch signal. Among bManJogPos and bManJogNeg, the priority is determined by which signal is set first. A pending bReleaseLimitSwitch does not block the requested direction of rotation anymore via bManJogPos and bManJogNeg.
Now bReleaseLimitSwitch also is level-sensitive. This means that an activated limit switch is immediately retracted when bReleaseLimitSwitch is set and the error is acknowledged in the manual jog operating mode. The retraction of the limit switch is interrupted if the limit switch has already been retracted and / or the bReleaseLimitSwitch signal is no longer pending.
Which products are affected?
8400 HighLine with FW < 05.01
What happens?
A logical combination of the positive / negative manual jog bit and the retract hardware limit switch bit results in an unexpected direction of movement or the drive braking against the control.
When does the problem occur?
If the retract limit switch bit has been activated, it interacts with the bits for activating the positive / negative direction of travel. The drive decelerates until it e.g. comes to a standstill if retracting has been activated and positive / negative manual jog is requested in addition. Moreover, bReleaseLimitSwitch is edge-sensitive only.
Possible diagnostics?
Unexpected motor behaviour when manual jog is activated.
Short-term measures / recommendations?
Always set the bManJogPos, bManJogNeg, and bReleaseLimitSwitch signals exclusively.
Evaluation:
The error can be avoided if the recommendations are followed.
Information taken from chapter 1.1.21 of
Service Message No. 16/2010.
