Emerson 12P3162X162 SLS 1508 module
Technical data of product parameters
The Servo Driver module operates as a two-channel closed-loop servo card, or as a 12P3162X162
single-channel closed loop servo card that accommodates dual LVDTs. A
configuration flag is set/reset to select the option.
The dual-channel option uses a single sine-wave or DC feedback to detect valve
position for each channel. The feedback signal’s amplitude is proportional to valve
position. A programmable gain amplifier is used to increase the resolution of the
feedback signal and is adjusted for optimum performance during a calibration
sequence.
When a sine-wave input is used as the feedback, it is assumed that the feedback 12P3162X162
signal provided is proportional to valve position, and linear. The sine-wave input is
rectified and the result is uni-polar. The input can accommodate a signal of
increasing or decreasing amplitude as the valve is stroked from 0 to 100%.
Depending on the customer mechanical hookup, a failed signal would then appear
to the card as a valve flying open, or a valve flying closed, and the resulting control 12P3162X162
action would be to close the valve, or to open the valve.
The single channel option executes only one PI loop in the microcontroller
firmware. Prior to executing the PI loop, the feedback positions from each channel
are high selected.
Another option is the “failInPlaceFlag” option. If the option is set and the Controller
stops updating the module, the target position remains at the most recent position.
If the “failInPlaceFlag” option is not set, the target position is set to -5%.
Product picture display
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Introduction to main products
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