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94 Model 2700 Transmitter with PROFIBUS-PA
Troubleshooting
6.4 Transmitter does not communicate
If the transmitter does not appear to be communicating on the network, then:
• Make sure the PROFIBUS network has proper termination.
• Check the PROFIBUS wiring between the transmitter and the DP/PA coupler, and between the
DP/PA coupler and the host system.
• Perform the procedures under Section 6.9.4.
• Make sure the node address is set correctly. The node address is set to a default value of 126 at
the factory. See Section 2.3.
• If using a configuration tool such as Simatic PDM, check whether the transmitter shows up in
the live devices list.
• Make sure the I/O configuration is set up properly. See Section 2.5.
6.5 Function blocks in Out-of-Service mode
If all of the transmitter function blocks (AI, AO, and totalizer) are stuck in Out-of-Service mode, there
may be a fault alarm active. The status alarms that will trigger OOS mode are shown in Table 6-2.
Refer to Section 6.8 for a full description of status alarms and possible remedies.
6.6 Zero or calibration failure
If a zero or calibration procedure fails, the transmitter will send one or more status alarms indicating
the cause of failure. Refer to Table 6-4 for descriptions of status alarms and possible remedies.
Table 6-2 OOS-mode alarms
Alarm Description
A001 EPROM checksum error
A002 RAM test error (core processor)
A003 Sensor failure (no tube interrupt)
A004 Temperature sensor out-of-range
A005 Input over-range
A008 Density over-range
A016 Line RTD temperature out-of-range
A017 Meter RTD temperature out-of-range
A022 (E)EPROM configuration DB interrupt (core processor)
A023 (E)EPROM totals corrupt (core processor)
A024 (E)EPROM program corrupt (core processor)
A025 Protected boot sector fault