Description
The equation to provides one look-up table for FORWARD linearization and one look-up table for REVERSE linearization.
| Input: | 2 x 24V pulses, quadrature |
| Range: | 0-400Hz |
| Output: | 0-10Vdc isolated |
| Relay : | RLY1 closes on forward direction |
Details
- Input P1 will measure frequency directly in Hz.
- Input P2 will measure the phase difference from P1. If the quadrature sensor is predictably aligned then it will output +90deg in the forward direction and -90 deg in the reverse direction. If the forward relay closes when in reverse then swap the two inputs.
- When the output from P2 is positive then the relay 1 will close and table 3 is used to linearize the measured frequency on P1
- When the output from P2 is negative then the relay 1 will open and table 2 is used to linearize the measured frequency.
- The linearize measurement is output on M4 and retransmitted.
This program is used in functional programming examples HLP1085 and HLP1086
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(uap1096a2.usc = USC701 application program for USC number 2.) USC programs 1 and 2 are identical except for the look up tables. (uap1096a.pdf = printable copy of this text.) |