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HART Multiplexer System KFD*-HM*-16
Diagnosis and fault elimination
8
Diagnosis and fault elimination
8.1
General
Note
8.2
LED indication
Red
Green
Off
Off
On
On
On
Off
On
On
8.3
Status/response code (response code)
8.3.1
General
52
This section provides operating instructions to be used if faults occur and describes
the possible causes of such faults.
Faults and failures are signalled via the following means:
•
LEDs (see section 5.4.3 and 8.2)
•
Status/response code (see section 8.3)
•
Extended device status (see section 8.4)
The following fault conditions can occur during the initialization phase after start-up:
Orange
Cause
• No power supply available.
• LED(s) defect
Off
Fault in device hardware
On
(CPU, ROM)
Fault in device hardware
Off
(CPU, ROM)
• Fault in device hardware
(CPU, RAM)
Off
• Device parameter assignment
incorrect (parameter Loop
Switch Delay, command 161)
Two status bytes, also referred to as the "Response code" are contained in every
message from a field device. These contain three types of information:
•
Communication errors
•
Command responses and the
•
Device status.
Depending on Bit 7, the first two types are contained in the first status byte. The
device status is always transferred in the second byte.
Corrective action
• Check power supply.
• Select DIP switch 1, isolate power
supply briefly. LEDs flash one after the
other.
Send device to Pepperl+Fuchs for
repair.
Send device to Pepperl+Fuchs for
repair.
• Send device to Pepperl+Fuchs for
repair.
• Parameterize device again. If this is
not successful, the device must be
sent to Pepperl+Fuchs for repair.
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