The Honeywell UDC Universal Digital Controller is a microprocessor-based stand alone controller. It combines the highest degree of functionality and. Find great deals for Honeywell UDC Universal Digital Controller. Shop with confidence on eBay!. There are UDC ‘s at both ends, however as the set point is managed by Lookout, the controllers just provide local control and display the.
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The lake receives water from a river and releases it to the same down stream. Open the gate x amount for x period. What I need to identify is the value that drives the output.
You have given some 3000 problem definition. The UDC configuration described is a level control wherein the object of the control loop appears to be:.
This control occurs at two places on the reservoir: Inlet Flow and Outlet Flow. The inlet control is likely configured for reverse operation increaed level decrease output, close gate. The outlet control is likely configured for direct operation hoeywell level increase output, open gate.
The set point should be the desired level of the reservoir. The UDC should also receive a level signal from the field indicating actual level.
Honeywell UDC3000 Specification
The output signal goes to the head gate and adjusts its position to increase or decrease flow into or out of the reservoir. Since both UDC work to maintain level, there may be conditions where the two work together or against each other to maintain the reservoir level.
Since the two can be connected through Lookout, you may consider implementing a staged control wherein hlneywell downstream UDC handles a majority of level changes in the reservoir small deviations in level. First mention your complete model no.
HONEYWELL UDC SPECIFICATION Pdf Download.
So that i can help you to resolve the problem. Thanks for the reply. Here are is the model number and settings. Could this be a span problem? I’ve fiddled around with a few UDCs and being typical Honeywell the book is about as clear and thick as mud.
SPHiLim is the parameter that determines how high the setpoint on the controller can be wound up to.
Honeywell UDC – In Stock, We Buy Sell Repair, Price Quote
It doesnt limit the controller output as the PID function will wind the output up until saturation if the measured value never reaches the setpoint. The ‘Rng1’ error your getting refers to the analogue input 30000 are twin-loop controllers though in your application loop 2 is disabled It shows that error when the input range goes above hkneywell or below 4ma.
I would verify your getting a good input signal and the full range of gate movement in reponse. Put the controller in manual and wind the output up and down while watching the measured value.
Once you verify everything going in and out of the controller as it should I would then start to look at parameters INSIDE the controller. Try those and reply if its still not working. I would like a little more clarification on what your measuring and what your controlling – ‘gate position’ is pretty hard to measure unless you have some sort of valve positioner arrangement. The bound manual you are looking for is Product E. Perhaps you could order one from Honeywell.
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If you’re not already a member, consider joining. It’s free, and you can customize the content you uec, as well as being able to subscribe to threads and topics, getting new posts delivered to your email as they appear. Welcome to the Modbus Community, about the world’s leading automation protocol. By Biscuithead on 12 July, – 7: By Bill Clemons on 15 July, – 5: The UDC configuration described is a level control wherein the object of the control loop appears to be: Adjust the head gate position to maintain reservoir level.
Honeywell UDC 3000 Universal Digital Controller
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