MTS Series 793 - Manual (Page 237)

• The amount of channel limiting applied increases as the limiting signal goes further into the bandwidth
and will stop actuator movement when it reaches one of the limits.
• Decreasing the bandwidth or moving the limits further apart will increase the range of control that is not
affected by channel limiting.
Important:
The performance of a CLC control mode is affected by the servo valve’s mechanical balance adjustment.
An unbalanced servo valve can cause a CLC channel to exceed the CLC limit settings. Before attempting
to tune a CLC channel, make sure that the servo valve is properly balanced.
Filter Tab
This tab applies filtering to the selected control mode. Filtering reduces the system’s resonance responses,
allowing increased gain settings for better system response.
The default setting allows you to select and configure a second-order filter. If additional filtering is required,
click the + button to add additional filters. This allows you to cascade filters of the same type to create
higher-order filtering or add different types of filters that address different issues.
Access
Station Setup window > navigation pane > Channels PIDF control mode > > Filter tab
Filter Tab
Description Item
Selects filter types: Forward Loop
No Filter - Applies no filtering. Filter
Low-pass - Attenuates signals above a specified Low-pass frequency.
Band-stop - Attenuates signals within a Bandwidth at a specified Notch
frequency.
Break-Recover - Attenuates signals above the Break frequency. Phase
lag of the filter is reduced at higher frequencies by limiting the filter
attenuation at frequencies above the Recover frequency.
Lead-Lag - Applies a lead-lag compensator with a maximum of 2 poles
(lag) and 2 zeros (lead). Signals will be attenuated above the Pole 1 and
Pole 2 frequencies. Phase lag of the filter can be reduced at higher
frequencies by limiting the filter attenuation at frequencies above the Zero
1 and Zero 2 frequencies.
Add or remove filters.
+/- buttons
Edit the name of the filter.
Display Name
For a Low-pass filter, attenuation occurs above this value. Frequency
For a Band-stop filter, attenuation occurs in a Bandwidth around this
frequency value. Notch
MTS Series 793 Control Software 237
Station Setup