Troubleshooting Proline Promag 55 PROFIBUS DP/PA
122 Endress+Hauser
9Troubleshooting
9.1 Troubleshooting instructions
Always start troubleshooting with the checklist below, if faults occur after startup 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 ä 139
20 to 260 V AC and 20 to 64 V DC: 2 A slow-blow / 250 V
3. Measuring electronics defective Order spare parts ä 135
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 ä 135
2. Display module defective Order spare parts ä 135
3. Measuring electronics defective Order spare parts ä 135
Display texts are in a
foreign language.
Switch off power supply. Then press the OS keys simultaneously to switch the device back
on. The display text will appear in English (default) and is displayed at maximum contrast.
Measured value indicated,
but no signal
Measuring electronics defective Order spare parts ä 135
Æ
Error messages on display
Errors that occur during commissioning or measuring operation 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
– EMPTY PIPE = Type of error, e.g. measuring tube is only partly filled or completely empty
– 03:00:05 = duration of error occurrence (in hours, minutes and seconds)
– #401 = error number
"
Caution!
• Also observe the information on ä 62
• The measuring system interprets simulations and positive zero return as system errors, but displays them as notice
messages only.
Error number:
No. 001 – 399
No. 501 – 699
System error (device error) has occurred ä 124
Error number:
No. 401 - 499
Process error (application error) has occurred ä 132
Æ
Incorrect connection to the PROFIBUS master
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 ä 139
20 to 260 V AC and 20 to 64 V DC: 2 A slow-blow / 250 V
Fieldbus connection PROFIBUS PA: Check data line
Terminal 26 = PA +
Terminal 27 = PA
PROFIBUS DP: Check data line
Terminal 26 = B (RxD/TxD-P)
Terminal 27 = A (RxD/TxD-N)
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