Extended Device Status - Pepperl+Fuchs KFD HM 16 Series Manual

HART Multiplexer System KFD*-HM*-16
Diagnosis and fault elimination
8.4

Extended device status

1st Byte
Bit Operation in progress
7 Reset
6 REBUILD
internal EEPROM write function
5
4 SCAN
Self test (command 41)
3
2 ... 0 reserved
2nd Byte
Bit Detected hardware fault
Current loop
7
6 ROM error
5 EEPROM error
4 ... 0 reserved
3rd Byte
Bit State
7 reserved
Searching
6
5 Disappeared
4 Appeared
Mismatched
3
2 ... 0 reserved
56
The extended device status can be called up via command 48. It provides five bytes
of information, which are thematically arranged:
Operation in progress
The Byte indicates which operation is in progress. The information is coded bit by bit.
The coding is shown in the following table:
Meaning
Start-up sequence running and must be completed.
REBUILD function is running and must be completed.
Switching off the power supply can result in loss of the parameter
assignment.
SCAN function is running and must be completed.
The device self test is executed (as when the power supply is
switched on); if no error occurs, the "Malfunction" status message
(see section 8.3.3) clears (if it is set).
Reserved.
Hardware fault
This Byte, which is also bit by bit coded, indicates any hardware faults that have
been found. Hardware faults are only detected during the initialization sequence after
the power supply has been switched on.
Meaning/remedial action
OR logic operation on all detected hardware faults in the current
loops. Check the transmitter and its cabling, then execute
REBUILD.
Send device to Pepperl+Fuchs for repair.
Send device to Pepperl+Fuchs for repair.
Reserved.
SCAN error
The Byte indicates an OR logic operation for all errors that have been detected
during the SCAN function.
Example: If a field device has been detected as having disappeared and another as
mismatched, then these two Bits are set simultaneously.
The bit by bit coded information is shown in the following table:
Meaning
Reserved.
Transmitter is searched for (due to
having disappeared).
Transmitter no longer responds.
Transmitter responds again.
Despite this, another transmitter has
responded.
Reserved.
Corrective action
• Check cabling.
• Check transmitter.
Check cabling.
Transmitter has been exchanged for
another type. Check type, rebuild loop.