ACH550 E-Clipse Bypass User’s Manual 2-105
Embedded fieldbus
Serial communication diagnostics – drive
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 bypass 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 Parameters section on page 2-61
describes these parameters in detail. Group 53 applies to the drive external
communications. Group 50 applies to the bypass external communications.
Diagnostic situations
The sub-sections below describe various diagnostic situations – the problem
symptoms and corrective actions.
Normal operation
During normal network operation, 5306…5309 bypass parameter values act as
follows at each bypass:
• 5306
DV OK MESSAGES advances (advances for each application message
properly received and addressed to this drive).
• 5307
DV CRC ERRORS does not advance at all (advances when an invalid
message CRC is received).
• 5308
UART ERRORS does not advance at all (advances when character format
errors are detected, such as parity or framing errors).
• 5309
DV 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.)
Loss of communication
The action taken by the ABB E-Clipse Bypass, if communication is lost, is configured
in Communications fault. The parameters are 3004
COMM LOSS and 3005 COMM TIME.
The Parameters section describes these parameters in detail.
No master station on line
If no master station is on line: Neither the
EFB OK MESSAGES nor the errors (5307 EFB
CRC ERRORS and 5308 EFB UART ERRORS) increase on any of the stations.
To correct:
• Check that a network master is connected and properly programmed on the
network.
• Verify that the cable is connected, and is not cut or short circuited.
To Next Page
Loading...
