Appendix C—Optional Communication Cards
298
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
PROFIBUS Diagnostics
The C445 PROFIBUS communication card uses extended
diagnostics to provide the status information along with fault
and warning data relevant to the operation of the system.
Any time a fault condition is present in the system, the
“ext.diag.” bit (bit3 in first diagnostic data byte) will be set
high, indicating to the Master, a high level diagnostic
message and fault is present. The C445 PROFIBUS
communication card will also set the appropriate word/bit/
bits in diagnostic data bytes 11 and 16 to indicate to the user
the reason for the fault/warning condition.
When the fault condition is cleared, the “ext. diag.” bit (bit3
in first diagnostic data byte) will also clear, indicating to the
Master that the C445 system is healthy and ready for
operation.
Table 122. C445 Diagnostic Telegram Details
Below picture shows how diagnostics message is sent to
Master.
Extended diagnostics frame has 10 bytes where first 4 bytes
are header followed by 6 bytes fault and warning data. For
example in above picture 0A 81 01 00 bytes are header
information. 1A 00 00 00 00 00 are diagnostics information
where 1A 00 forms a fault code word 0x001A, which means
Communication lost with MM. 00 00 00 00 are the warning
bits per Modbus register 318. When there is no fault or
warning in the system, all 6 bytes of diagnostics data will
be 0.
Optional Features
Freeze Mode
Freeze Mode is supported in the C445 PROFIBUS
communication card.
Sync Mode
Sync Mode is supported in the C445 PROFIBUS
communication card.
Fail Safe Mode
Fail Safe Mode is supported in the C445 PROFIBUS
communication card. On the reception of a Clear Data frame
from the Master, the C445 PROFIBUS communication
module outputs will go to fail safe mode–outputs disabled.
Byte No.
Description
1 to 6
PROFIBUS DP standard diagnostics
7 to 10
Extended diagnostics header
11 to 12
Active Fault Code (Modbus Register No.312)
13 to 16
Warning Status Bits (Modbus Register No.318)