Topworx DXP - Maintenance; Error Code and Problem Table; 4-20 mA Current Position Transmitter Operation; Stand Alone Potentiometer Operation

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Maintenance
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Error Code and Problem Error Code and Problem
Error Code and Problem Error Code and Problem
Error Code and Problem
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OperaOpera
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tion of the 4-20mA Current Position tion of the 4-20mA Current Position
tion of the 4-20mA Current Position tion of the 4-20mA Current Position
tion of the 4-20mA Current Position
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ransmitter
During run mode, the 4-20mA position transmitter will output 4-20mA for valve positions between and including the set points. The module has an
optional over or under travel correction if the valve position exceeds the high or low set point by +/-3%. In other words, the output will be 4mA for +/-
3% over and under travel on the low end and 20mA for +/-3% over and under travel on the high end. If the valve position exceeds 3% of over travel
then values below 4mA or above 20mA will be output. The user selectable other option is to calibrate the device without the over and under travel
capability. See the calibration procedure in this document for additional information.
OperaOpera
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tion of the Stand tion of the Stand
tion of the Stand tion of the Stand
tion of the Stand
Alone PotentiometerAlone Potentiometer
Alone PotentiometerAlone Potentiometer
Alone Potentiometer
The potentiometer only version will generate a ratio metric voltage output based on the excitation voltage and the position of the valve. Standard
potentiometer options include 0-1k ohm and 0-10k ohm.
Problem
Transmitter Module has no current output
Transmitter does not output 4 or 20mA (+/-1%) at desired end of
travel
Output is not linear or does not track valve position or rotation
Error Code 4-3
Error Code 4-4
Error Code 4-5
Error Code 4-6
Error Code 4-7
Error Code 4-1
Probable Cause/Solution
If the LED on the Transmitter Module is not lit
Loose or shorted signal connection (fix connection)
Controller Board not responding (Replace Transmitter Module)
If the LED on the Circuit Board is lit
Potentiometer is disengaged from shaft (must be returned for
repair)
Defective controller board (Replace Transmitter Module)
Unit not calibrated (calibrate)
Unit is calibrated (recalibrate - if still fails, replace board)
Input signal is not linear
Linkage or drive mechanism is introducing non-linearity
Unit is not calibrated (calibrate)
Start position is too low or in the dead-band position. See illustration 9
Start Position is too high
Start and stop positions are less than 20
0
, increase valve rotation
between start and stop positions to greater than 20
0
.
Rotation has exceeded the 320
0
limit. Decrease valve rotation between
start and stop positions to less than 320
0
.
Calibration rotation was in the wrong direction or the potentiometer
passed through the dead-band position.
Internal Error has occurred. Recalibrate, if error continues, replace
module.
Warranty
TopWorx warrants that each item of new equipment manufactured by it will be free from defects in material and workmanship under normal use and service; its obligation under this Warranty, being limited to making good,
at its factory, and part of parts thereof, which shall be returned to it with transportation charges prepaid, within one year after the date of the purchase of such equipment by the original purchaser, and which its
examination shall disclose to its satisfaction to have been thus defective. TopWorx however, assumes no risk or liability for results of the use of the products purchased from it.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, WHETHER OF MERCHANTABILITY FITNESS, OR OTHERWISE EXPRESSED OR IMPLIED, AND ALL OTHER OBLIGATIONS OR LIABILITIES AND TOPWORX NEITHER
ASSUMES , NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS EQUIPMENT.
No claims for labor in replacing defective parts and equipment and consequential damages will be allowed by the Company.
This Warranty shall not apply to equipment which has been subjected to misuse, negligence or accident.
This Warranty shall not apply to any equipment which shall have been repaired or altered, outside the Company's factory so as to affect such equipment's stability or reliability in the judgement of the Company.