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<.
550-UH User’s Manual
Embedded fieldbus
Diagnostics – EFB
Fault queue for drive diagnostics
For general A
YK
550 diagnostics information, see
on page
three most recent A
YK
550 faults are reported to the fieldbus as defined below. For
specific A
YK
550 fault codes, see
on page
Serial communication diagnostics
Network problems can be caused by multiple sources. Some of these sources are:
•
Loose connections
•
Incorrect wiring (including swapped wires)
•
Bad grounding
•
Duplicate station numbers
•
Incorrect setup of drives or other devices on the network
The major diagnostic features for fault tracing on an EFB network include Group 53
EFB Protocol parameters 5306…5309. The
Complete parameter descriptions
section describes these parameters in detail.
Diagnostic situations
The sub-sections below describe various diagnostic situations – the problem
symptoms and corrective actions.
Normal operation
During normal network operation, 5306…5309 parameter values act as follows at
each drive:
•
5306
EFB
OK
MESSAGES
advances (advances for each application message
properly received and addressed to this drive).
•
5307
EFB
CRC
ERRORS
does not advance at all (advances when an invalid
message CRC is received).
•
5308
EFB
UART
ERRORS
does not advance at all (advances when character format
errors are detected, such as parity or framing errors).
•
5309
EFB
status value varies depending on network traffic.
•
BACnet protocol: 5316
EFB
PAR
16 (MS/TP token counter) advances for each
token passed to this drive. (Does not apply for other protocols.)
Drive Parameter
Protocol Reference
Modbus
N2
FLN
BACnet
0401
Last Fault
40401
17
90
AV18
0412
Previous Fault 1
40402
18
91
AV19
0413
Previous Fault 2
40403
19
92
AV20
Summary of Contents for Johnson Controls AYK550-UH
Page 2: ......
Page 8: ...1 8 A 550 UH User s Manual Table of contents ...
Page 32: ...1 32 A 550 UH User s Manual Installation ...
Page 66: ...1 66 A 550 UH User s Manual Application macros ...
Page 186: ...1 186 A 550 UH User s Manual Parameters ...
Page 333: ...A 550 UH User s Manual 1 333 Technical data ...