SD01189C/07/EN/04.17
Endress+Hauser
22 © Copyright Dec. 2016
5 Diagnostics
Diagnostic information for the device is provided through various mechanisms:
LEDs of the 485/ETH module
Status of device variables
Modbus registers
5.1 LED displays
off = Connection inactive
on = Connection is enabled
Flashing = Data transmission
off = Transmission rate 10 MBit/s
on = Transmission rate 100 MBit/s
Supply voltage is present and module is initialized.
Modbus telegram is being received or used.
off = No termination
on = Termination is used
5.2 Status of device variables
The status information of a device variable provides information about its validity and usability. It should
be evaluated in the PLC program. Device variables AO/DO transmitted from the PLC have to be sending
with a status “good” to be used by the device.
For more information about the encoding of the status see section 0.
5.3 Status signal
The status signal is in accordance with Namur recommendation NE107.
The measured value of the affected channel is no longer reliable. The
cause can be found in the measuring point. Any control unit that may
be connected should be switched to manual operation.
Maintenance work is being carried out on the device. Wait until it is
completed.
The measuring point is being operated out of specification. Operation
is still possible. However, there is the risk of increased wear and tear,
a shorter operating life or reduced accuracy. The cause can be found
outside the measuring point.
The measurement functionality is still available. There is no
immediate need for action. However, maintenance will prevent the
future occurrence of possible faults.
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