Eaton MTL F809F-Plus, Руководство пользователя

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Eaton’s Crouse-Hinds Business
Cooper Crouse-Hinds Pte Ltd
No. 2 Serangoon North Ave 5 #06-01
Singapore 554911
tel: + 65 6645 9888
fax: +65 6297 4819
Page 41
Parameter Symbol / Alert Remedy
Peak low
frequency
noise
High PreAlert
High Alert
If frequent alarms, 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 box, intermediate junction boxes, in marshalling cabinet and
correctly connected to ground;
3. No AC cabling close to fieldbus cabling;
4. Wire terminations are properly secured.
Peak
in-band
frequency
noise
(fieldbus
frequency)
High PreAlert
High Alert
If frequent alarms, check:
1. For operation of radios with Effective Radiated Power (ERP) up to 5W
being used within 1.5m of fieldbus devices, junction box or cabling;
2. Fieldbus screen is correctly cut back and taped at each of the fieldbus
devices;
3. Fieldbus screen connections are correctly made in fieldbus wiring block
junction box, intermediate junction boxes, in marshalling cabinet and
correctly connected to ground;
4. No AC cabling close to fieldbus cabling;
5. Wire terminations are properly secured;
6. For welding in the plant;
7. Poor grounding of frequency controlled drives.
Peak high
frequency
noise
High PreAlert
High Alert
If frequent alarms, check:
1. For operation of radios with Effective Radiated Power (ERP) up to 5W
being used within 1.5m of fieldbus devices, junction box or cabling;
2. For welding in the plant;
3. Poor grounding of frequency controlled drives.