Why is it still displayed when the flow meter exceeds the maximum value, and there is no alarm and NR is displayed?
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As title. . . . . . . . . .
Indeed, this situation seems to mean that the range given on the DCS is exceeded, but it does not exceed the measurable range of the meter. Please explain it to me brothers.
Is it a migration problem? ? Please help all the experts! !
Your question did not explain clearly what type of flow meter, what is the on-site panel display, and what is the indoor display. In addition, traffic tables are generally not migrated.
Your question did not explain clearly what type of flow meter, what is the on-site panel display, and what is the indoor display. In addition, traffic tables are generally not migrated.
If there is no alarm, it must be a DCS chain setting problem.
The question was not clearly clarified, and it was a bit inexplicable. I don’t know whether the model with the flow rate uses DCS or PLC.
This is normal. The general DCS input upper limit is about 21ma. Our company's CS3000 can have 22ma. If it exceeds 22ma, the IOP will be reported. As for what you said is NR, it is because the HI and HH alarms of the process are not set.
This has something to do with your configuration. Generally, the load of the device is not fixed, so it is normal for the instrument to display the upper limit after it exceeds the range. If the on-site differential pressure is 0~20kpa, the indoor range is 0~50t/h. Usually the configuration will take into account that the instrument cannot read when it exceeds the existing range. At this time, the configurer will increase the upper limit of the secondary meter range, which means that even if the volume exceeds 0~50t/h, the current measured tonnage can still be read. As long as the upper limit is not exceeded, it can continue to be displayed. From a DCS system, this must be added. Needless to say, the upper limit value here = the secondary meter range plus the secondary meter range multiplied by 3% is the upper limit value. If it exceeds too much, the primary and secondary meter ranges need to be changed again.