Delta RMC151 - Manual (Page 211)

3 Controller Features
To compensate for the delay, set SSI Wire Delay parameter. You can enter the wire
length or enter the time delay directly. The SSI input will then use the delay value to
correctly read the SSI input data.
Transducer Lengths
Magnetostrictive linear transducers with SSI output may require a minimum time
between interrogation based on the length of the transducer. Check your transducer data
sheet for details. Increasing the Loop Time of the RMC will increase the maximum allowed
length of the transducer. See the MDT Fundamentals topic for details.
Setting up SSI Axes
To set up axes with SSI feedback, read the following topics:
SSI Wiring
SSI Scaling
Note:
The Universal I/O module high-speed channels must be configured as SSI before being used
as SSI inputs.
The following parameters must be also set for axes with SSI feedback:
• SSI Data Bits
• SSI Format
The following advanced parameters can be optionally set for axes with SSI feedback:
• SSI Clock Rate
• Wire Break Detection
• SSI Overflow Mode
• SSI Home Source
• SSI Clock Mode (UI/O module only)
• SSI Termination (UI/O module only)
• SSI Wire Delay (UI/O module only)
3.12.3. Analog Feedback Fundamentals
"Analog" in the RMC refers to analog voltage or current.
Analog Feedback
Analog voltage or current feedback coming to the RMC is sampled multiple times per loop
time. At each sampling, the voltage or current is converted to a number by an ADC
(Analog to Digital Converter). The samples are then averaged to produce one number per
loop time. See the data sheets of each analog feedback module for details on the
resolution of the analog-to-digital conversion.
The following modules support analog feedback from a transducer or potentiometer:
Module Analog Feedback Types
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