S748-772 Instructions Manual | 7 Technical description
7.7.2 Behavior in the event of an error (with standard setting)
The behavior of the servo amplifier always depends on the current setting of a number of dif-
ferent parameters (e.g., ACTFAULT, VBUSMIN, VELO, STOPMODE, see Online Help).
Uncontrolled coasting!
Some faults (see ERRCODE ) force the output stage to switch-off immediately, independent
from the ACTFAULT setting. Danger of injury by uncontrolled coasting of the load. An addi-
tional mechanical brake is required for functional safety, which must be safely operated.
The diagram shows the startup procedure and the procedure that the internal control system
follows in the event of motor overtemperature, assuming that the standard parameter settings
apply. Fault F06 does not switch-off the output stage immediately, with ACTFAULT=1 a con-
trolled emergency brake is started first.
(F06 = error messages "Motor Temperature")
Even if there is no intervention from an external control system (in the example, the ENABLE
signal remains active), the motor is immediately braked using the emergency stop ramp if the
error is detected and assuming that no changes have been made to the factory setting
(ACTFAULT=1).
In case of a built-in safety card, wait for the Ready Acknowledge (X30 Pin 16) of the safety
card before enabling the servo amplifier again.
38 Kollmorgen | kdn.kollmorgen.com | July 2019
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