Following Error Limit; Maximum Operating Speed - Parker Compax3 Operating Instructions Manual

Parker EME
Disadvantages
caused by a
following error
Error message
Minimizing the
following error
4.1.9.3

Following error limit

The error reaction upon a following error can be set:
Possible settings for the error reaction are:
No response

Downramp / stop

Downramp / stromlos schalten (standard settings)

The following error is a dynamic error.
The dynamic difference between the setpoint position and the actual position
during a positioning is called the following error. Do not confuse this with the static
difference which is always 0; the target position is always reached exactly.
The change of position over time can be specified exactly using the parameters
jerk, acceleration and speed. The integrated Setpoint value generator calculates
the course of the target position. Because of the delay in the feedback loop, the
actual position does not follow the target position exactly. This difference is referred
to as the following error.
When working with a number of servo drives (for example Master controller and
slave controller), following errors lead to problems due to the dynamic position
differences, and a large following error can lead to positioning overshoot.
If the following error exceeds the specified following error limit, the "following error
time" then expires. If the following error is even greater than the following error limit
at the end of the following error time, an error is reported.
If the following error falls short of the following error limit, a new following error time
is then started.
The following error can be minimized with the help of the extended (advanced)
control parameters, in particular with the feed forward parameters.
1: Following error limit
2: Following Error Time
NO ERROR: O0: no error
ACKN: I0: Quit (on positive edge)
4.1.9.4

Maximum operating speed

The speed limitation is deduced from the maximum operating speed. In order to
ensure control margins, the speed is limited to a higher value.
The speed setpoint value is actively limited to 1.1 times the given value.
If the speed actual value exceeds the preset maximum speed by 21% (="switching
off limit speed"), error 0x7310 is triggered.
192-120113 N08 C3I12T11 - December 2010
Setting up Compax3
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