200
ACS550 User’s Manual
Embedded fieldbus
Fault 28 – Serial 1 Err
If the drive’s control panel shows fault code 28,
SERIAL
1
ERR
, check for either of the
following:
• The master system is down. To correct, resolve problem with master system.
• The communication connection is bad. To correct, check communication
connection at the drive.
• The time-out selection for the drive is too short for the given installation. The
master is not polling the drive within the specified time-out delay. To correct,
increase the time set by parameter 3019
COMM
FAULT
TIME
.
Faults 31…33 – EFB1…EFB3
The three EFB fault codes listed for the drive in chapter
on page
(fault codes 31…33) are not used.
Intermittent off-line occurrences
The problems described above are the most common problems encountered with
ACS550 serial communication. Intermittent problems might also be caused by:
• marginally loose connections
• wear on wires caused by equipment vibrations
• insufficient grounding and shielding on both the devices and on the
communication cables.
Summary of Contents for ACS550 Series
Page 1: ...ACS550 User s Manual ACS550 01 Drives 0 75 132 kW ACS550 U1 Drives 1 200 hp ...
Page 4: ......
Page 10: ...10 ACS550 User s Manual Table of contents ...
Page 84: ...84 ACS550 User s Manual Application macros ...
Page 188: ...188 ACS550 User s Manual Parameters ...
Page 242: ...242 ACS550 User s Manual Fieldbus adapter ...
Page 276: ...276 ACS550 User s Manual Technical data WARNING Do not use RFI EMC filters on IT systems ...