Eaton CROUSE-HINDS Series Instruction Manual page 33

Parameter
Segment Voltage
Average low
frequency noise
Average
in-band frequency
noise (fieldbus
frequency)
Average high
frequency noise
INM F809F-Plus (DTM) Rev 1.8
Check the Navigation area for field instrument that show an error, and investigate the
respective field instrument(s).
The following conditions can occur on a segment block node:
Symbol / Alert
Low Alert
Low PreAlert
Check bulk power supply operation and wiring to carrier
High PreAlert
High Alert
Check:
1. Fieldbus screen is correctly cut back and taped at each of the fieldbus devices;
High PreAlert
2. Fieldbus screen connections are correctly made in fieldbus wiring block junction
box, intermediate junction boxes, in marshalling cabinet and correctly connected
High Alert to ground;
3. No AC cabling close to fieldbus cabling;
4. Wire terminations are properly secured.
Check:
1. Fieldbus screen is correctly cut back and taped at each of the fieldbus devices;
2. Fieldbus screen connections are correctly made in fieldbus wiring block junction
High PreAlert
box, intermediate junction boxes, in marshalling cabinet and correctly connected
to ground;
High Alert
3. No AC cabling close to fieldbus cabling;
4. Wire terminations are properly secured;
5. For welding in the plant;
6. Poor grounding of frequency controlled drives;
7. Use of high power radios close to fieldbus network.
Check:
High PreAlert
1. For welding in the plant;
2. Poor grounding of frequency controlled drives.
High Alert
Remedy
continued on the next page
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