MTS Series 793 - Manual (Page 207)

Item Callout
The offset applies to the feedback signal. You specify the offset in
engineering units.
Offset considerations
Consider these items before offsetting a feedback signal:
• Offset alters the feedback signal used by the digital (PIDF) controller and is included in the closed-loop
control calculations.
• Offset cannot be used to clear interlocks tripped by signal saturation.
• Offset is limited to ±½ the current full-scale range.
• The usable range is limited in the direction that zero is offset.
Offset/Zero Tab
The Offset/Zero tab provides controls that allow you to apply offsets to an input signal. Any settings made
in the Offset/Zero tab are saved with the parameter set (not in the calibration file).
Note:
You can also use the Signal Auto Offset window, available in the Station Controls toolbar in the main
Station Manager window, to apply an Auto Offset to any input signal.
Access
Station Setup window > navigation pane > Channels control mode > >Offset/Zero tab (Calibration access
level required).
Description Item
Automatically applies a zeroing offset to the selected conditioner feedback
signal. Auto Offset
Optional—Select the Auto Offset Lock checkbox to disable auto offset for
the Tuning, Operator, and Configuration access levels.
A slider control allows you to manually apply an offset to the selected
conditioner feedback signal. Manual Offset
Note:
If station power is on, this control cannot be used to offset active
control modes.
The Offset/Zero tab includes settings that allow you to apply offsets to the
conditioner’s sensor signal. Electrical zero settings are only available for Electrical Zero
certain conditioners (such as the Model 493.21B, 494.21, 497.22,
494.47/494.49 used with non-incremental encoders, and Model 497.13).
MTS Series 793 Control Software 207
Station Setup