Profibus IQ plus 800, Installation And Programming Manual

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Appendix 15
4.0 Appendix
4.1 Troubleshooting
The following section provides information for diagnosing communications problems between the indicator and
the ProÞbus master. The status of the LEDs on the ProÞbus Indicator Interface can be used to diagnose the
general area of difÞculty, as shown in Table 4-1.
If there is no communication between the indicator and the master device, do the following:
1. Ensure DIP switches on the ProÞbus board are set correctly (see Section 2.2 on page 4).
2. Power down,then power up the ProÞbus Indicator Interface.
3. Ensure the ProÞbus master device is set to send a command to the slave. Commands are listed in
Section 3.0 on page 8.
4. Check the
OUTPUT
and
RxD
jumpers to ensure they are set for RS-232 communications (see
Section 2.1.1 on page 3).
5. Check the wiring from the indicator to connector J5 on the ProÞbus board (see Section 2.1.2 on page 3).
6. Ensure the indicator conÞguration is correct.
7. Check that the master is set up correctly to communicate with the slave device.
8. On the ProÞbus board, ensure that the 3.3V LED is lit. If it is not, check connector J6 for a loose or
incorrect connection (see Figure 2-2 on page 2). If the LED is still not lit, replace the ProÞbus Indicator
Interface power supply.
9. Locate EPROM U7 found in the middle of the ProÞbus board (see Figure 2-2 on page 2). Ensure that the
chip is seated by pressing down on the chip.
10. Check that the connector J4 on the ProÞbus board is Þrmly connected.
11. If no problems are found in the checks above, replace the ProÞbus board.
Symptom Possible Cause
POWER LED not lit No power to Profibus board. Ensure connector J6 on the Profibus
board is properly seated.
RxD LED flashes constantly; TxD LED not lit Indicator is streaming data to the Profibus slave. Check indicator
configuration. See Section 2.4 on page 7 for indicator configuration
information.
TxD LED flashes every two seconds; RxD LED not lit Serial connection between the indicator and the Profibus Indicator
Interface is not correct. See Section 2.4 on page 7 for indicator
configuration information.
Table 4-1. Troubleshooting Symptoms Indicated by LEDs
DISCONTINUED