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yogokowa field bus system transmitter all's we are geting
IOP fault in Contiunes please help me fine how we can
normal the broblems?
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Answer Posted / osagie
IOP Faults are very common in any Yokogawa Fieldbus setup.
As rightly stated in Ans 1, it means Input Open. The idea here is that there is an open circuit somewhere. The circuit here may be the physical circuit or the logical circuit. By logical circuit, I mean the control drawings.
Now lets look are typical scenarios and solutions:
1. Transmitter input over ranged: For a transmitter that is supposed to transmit up to 100%, if its getting a 110% input, it goes on IOP (+) but you will not see the + most times. Under ranged transmitter would give IOP-.
Solution: Get the transmitter input back to the normal range.
2. Consider a control loop with a transmitter input to a controller. whenever the transmitter fails, the controller will give an IOP fault i.e reporting that its input is open - in this case, check the transmitter and possibly change it if bad.
3. Sometime control valves give IOP when they are faulty.
4. Loop component failures can also cause IOP. Check components like the Mega blocks, connectors etc
In general, initial troubleshooting will be re-downloading the control drawing. You can also perform reconfiguration of the Fieldbus devive.
Hope this clarifies.
Osagie.
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