Over-Travel - Siemens SINAMICS V90 Operating Instructions Manual

7.2.4

Over-travel

When the servo motor travels over the distance limit, the limit switch is turned on and then
the servo motor has an emergency stop.
Travel limit signal (CWL/CCWL)
In S, T, PTI, or IPos control mode, the motor rotates properly after you do as follows:
● When F7492 is triggered after the STOP cam plus is reached in a positive traversing
direction, acknowledge the fault using the RESET signal, and then move the axis away
from the STOP cam plus in a negative traversing direction to return it to a position within
the valid traversing range.
● When F7491 is triggered after the STOP cam minus is reached in a negative traversing
direction, acknowledge the fault using the RESET signal, and then move the axis away
from the STOP cam minus in a positive traversing direction to return it to a position within
the valid traversing range.
Danger to life or malfunctions of the machine due to the motor travelling over the distance
limit
In T control mode, the motor travels over the distance limit if you only acknowledge the fault
without returning the axis to a position within the valid traversing range.
In S control mode, the motor travels over the distance limit if you only acknowledge the fault
without returning the axis to a position within the valid traversing range while signal CWL or
CCWL becomes from a low level (logic 0) to a high level (logic 1).
• Acknowledge the fault, and then return the axis to a position within the valid traversing
Note
• Make sure both signals CWL and CCWL are at a high level when the servo drive is
powered on.
• In S control mode, the motor cannot rotate with no fault if you only acknowledge the fault
without returning the axis to a position within the valid traversing range while signal CWL
or CCWL keeps at a low level.
• In PTI or IPos control mode, the motor cannot rotate with F7491/F7492 being triggered
again, if you only acknowledge the fault without returning the axis to a position within the
valid traversing range.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002
WARNING
range to prevent the motor from travelling over the distance limit.
Control functions
7.2 General functions
165