Sinamics Perfect Harmony Gh180 6Sr41 Manufactured In Nma Nuernberg, Germany - Siemens GH180 Operating Instructions Manual

Operation
8.2 Major Drive Faults and Alarms
This fault is hard-coded such that if the input line voltage exceeds 120%, a fault is created.
This is only true for Dedicated I/O IP protection. SOP based IP must include the Input Over-
voltage (
8.2.13 Speed Rollback
The Speed Rollback is a feature of the speed regulator. The feature prevents windup of the
integrator term when the regulator enters the non-linear state of being in torque limit.
The output of the regulator, which is the torque current reference, is clamped to one of the
torque limits. This sets the internal indicator as to whether the minimum limit or maximum limit
is the active limit. The integrator is prevented from winding up any further past the limit.
In the command generator algorithm, the speed ramp output (the speed regulator input) is
"rolled back" so that it maintains the speed regulator in saturation (at the clamp limit) but then
resets the ramp internal storage to at that level. This allows for a smooth transition when the
limiting condition is removed. In recovery, the ramp will then continue on from that point, to the
desired speed demand until the speed regulator is satisfied and the output speed matches the
desired speed. This action prevents a sudden speed or torque step should the torque limiting
source (usually the load) suddenly change, thus allowing a smooth transition from the non-
linear operating condition.
8.2.14 Disabling the Speed Rollup
Speed Rollback (rollup) is a normal process during ramp stopping. However, not all processes
are conducive to the speed rollback operation when the drive is in a regen limit.
Other processes may find it unacceptable when the torque limit occurs during the regeneration
quadrant in the motor, resulting in what has been termed "Speed Rollup". This is when the
torque limit is preventing the motor from regening too quickly. The ramp is still affected, but
the ramp output will be forced to go up in speed to get to the equilibrium point of the speed
reference (the input of the speed regulator) to maintain the regulator just inside the saturation
point.
This is generally true if the load is slowing down more than the speed ramp, resulting in a regen
condition of the motor. The ramp will "rollup" to prevent the speed error from climbing too high.
This type of load is referred to as an "over-hauling" load. An example might be a pump with a
large column of liquid or a draft fan with air flow pushing back on the blade. These would tend
to push the motor in the reverse direction requiring the drive to "regen" to a stop before going
forward.
Note
Four-Quadrant Capability
The SINAMICS PERFECT HARMONY GH180 is NOT a four-quadrant capable drive.
132
LineOverVoltageFault_I ) fault in the IP logic.

SINAMICS PERFECT HARMONY GH180 6SR41 manufactured in NMA Nuernberg, Germany

Operating Instructions Rev.201706301306