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6. Appendices
008-0738-00
Step
Connect a two-conductor cable between the remote switch and the mating
a
connector. Solder one conductor to pin A of the mating connector and the
other conductor to pin B. Attach the strain relief to the connector.
Attach the mating connector to the six pin connector on the SPM
b
c
After setting up the sensor and caliper module, power on the SPM and
verify the Power LED and the Rotor Active LED is lit on the top of the SPM.
Turn on the remote SHUNT CAL switch and verify the SHUNT CAL Mode
LED is lit on the top of the SPM. Turn off the remote SHUNT CAL switch
and verify the SHUNT CAL Mode LED turns off.
d
Setup of the Remote SHUNT CAL Option is complete.
6.3
APPENDIX C
Digital Filter Setting Supplement
This supplement is intended for the purpose of describing the function and operation of the
digital filtering algorithms that are included in the TMS 9250 v.1.38 firmware and above. It
should be used in conjunction with the TMS 9250 TMS Toolkit User Manual supplied with a
TMS 9250 Torque Measuring System.
Filter Operation General Description
The digital filter algorithm in the v1.38 firmware and above version of the TMS 9250 is a
recursive filter that behaves like an "RC" circuit. It has two user settings, the first being a
"level" set by the parameter FiltLevel, and the second being a filter "weight", set by the
parameter FiltSteps.
The "level" works as a threshold, above which the filter is reset to allow a fast response to an
event that exceeded the threshold. This is useful in the case when well-damped steady state
data is required, but when significant fast transients and disturbances should not be filtered
out.
The "weight" of the filter is set by increasing the number of filter steps, which in turn increases
the time constant of the RC filter, increasing the damping effect. The settings of any of the
TMS 9250 parameters can be changed at any time via the RS232 communications link.
Changing parameters while the system is running will take effect immediately, and in the case
of filter setting changes, will become effective as soon as the filter flushes through. The TMS
Toolkit software, supplied with the TMS 9250 system, simplifies the task of changing settings,
although any character-based communications software could be used instead (e.g.
HyperTerminal).
Filter Operation Detailed Description
Consider the input signal as being Vi and the output signal being Vo.
•
In a steady state situation, Vo will equal Vi.
•
When Vi changes, the extent of the change is compared with the threshold, which is
set as a proportion of the full scale sensitivity, by the parameter FiltLevel.
•
If the change exceeds the threshold, then the new input value is passed immediately
to the output, thereby resetting the filter.
•
If the change does not exceed the threshold, then the output value Vo is updated by a
fractional amount of the new value Vi until the output value equals the input value
40
© 2012 – Honeywell International Inc. All rights reserved
Action
TMS 9250 Product User Manual
Rev B
April 2012
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