If a diagnostic message is active, the corresponding bit is set or reset.
The following bits in the external diagnostic data are supported by SITRANS FUS060-PA all other
bits always remain reset:
Table B-10
Format of the diagnostic data, byte 4
Bit No.
Description
Meaning
0
Error appears
at least one bit of the following 4 bytes (DIAGNOSIS) has been set
1
reset
at least one bit of the following 4 bytes (DIAGNOSIS) has been reset
2 ... 7
reserved
---
Note
The "Error appears" message has priority over the "Error disappears", i.e. if a diagnostic bit is set
and another reset at the same time, "Error appears" will be displayed.
The DIAGNOSIS part contains device diagnostic messages and has the following structure (bit 0
= LSB, bit 7 = MSB):
Table B-11
Format of byte 5 diagnostic data (= DIAGNOSIS Byte 1)
Bit No.
Description
Meaning
Cause (local message)
0
DIA_HW_ELETR
Hardware failure of the elec‐
tronic
"Temperature measurement error"
"SSC error" Error in communication with internal pe‐
ripherals
"Communications module not addressable"
"Measuring module not addressable"
4
DIA_MEM_CHKSUM
Memory error
"EEPROM error"
"RAM error"
5
DIA_MEASUREMENT
Measurement failure
"Unreliable flow value"
"Measuring path error" (affects flow, sound velocity
and ultrasonic amplitude) This diagnostic message
also appears when the measuring tube is empty!
Flow outside sensor limits (not a local message)
Table B-12
Format of diagnostic data, Byte 8 (DIAGNOSIS Byte 4)
Bit No.
Description
Meaning
Cause (local message)
0 ... 6
reserved
---
7
EXTENSION_AVAILABLE
More diagnosis information is
available
More diagnosis information available (see DIAGNO‐
SIS--Byte 1 for local messages)
Format of byte 8 diagnostic data (= DIAGNOSIS Byte 4)
The bits in DIAGNOSIS take over the function of a collective message in most cases which can
then be broken down in more detail using the local messages.
PROFIBUS communication
B.6 Diagnostics
SITRANS FUS060 with PROFIBUS PA
Operating Instructions, 09/2021, A5E02225054-AD
95