FMC Corporation - Talstar 80 - Handbuch (Seite 69)

Proline Promass 80 PROFIBUS PA Troubleshooting
69
9 Troubleshooting
9.1 Troubleshooting instructions
Always start troubleshooting with the following checklist if faults occur after commissioning or
during operation. The routine takes you directly to the cause of the problem and the appropriate
remedial measures.
Check the display
No display visible and no
output signals present. 1. Check the supply voltage → Terminals 1, 2
2. Check device fuse → Page 85
85 to 260 V AC: 0.8 A slow-blow / 250 V
20 to 55 V AC and 16 to 62 V DC:2 A slow-blow / 250 V
3. Measuring electronics defective
→ order spare parts → Page 80
No display visible, but
output signals are present. 1. Check whether the ribbon-cable connector of the display module is correctly plugged
into the amplifier board
→ Page 80 ff.
2. Display module defective → order spare parts → Page 80
3. Measuring electronics defective
→ order spare parts → Page 80
Display texts are in a
foreign language. Switch off power supply. Press and hold down both the P keys and switch on the
measuring device. The display text will appear in English (default) and is displayed at
maximum contrast.
Measured value indicated,
but no signal at the current
or pulse output Measuring electronics defective → order spare parts → Page 80
Error messages on display
Errors that occur during commissioning or measuring are displayed immediately. Error messages consist of a variety of
icons. The meanings of these icons are as follows (example):
– Error type: S = system error, P = process error
– Error message type:
$ = fault message, ! = notice message
– MEDIUM INHOM. = error designation (e.g. fluid is not homogeneous)
– 03:00:05 = duration of error occurrence (in hours, minutes and seconds)
– #702 = error number
"
Caution!
Also refer to the information on
→ Page 40
System error (device error) has occurred → Page 71
Process error (application error) has occurred
→ Page 77
Faulty connection to control system
No connection can be made between the control system and the device.
Check the following points:
Supply voltage
Transmitter Check the supply voltage → Terminals 1/2
Device fuse Check device fuse → Page 85
85 to 260 V AC: 0.8 A slow-blow / 250 V
20 to 55 V AC and 16 to 62 V DC: 2 A slow-blow / 250 V
Fieldbus connection Check the data cable
Terminal 26 = PA +
Terminal 27 = PA
−
Fieldbus connector • Check pin assignment/wiring
→ Page 25
• Check connection between connector/fieldbus port.
Is the coupling ring tightened correctly?
Fieldbus voltage Check that a min. bus voltage of 9 V DC is present at terminals 26/27. Permissible range: 9
to 32 V DC