ACH580 E-Clipse bypass and packaged drive user manual 97
Embedded fieldbus
Duplicate stations
If two or more stations have duplicate numbers:
• Two or more drives cannot be addressed.
• Every time there is a read or write to one particular station, the value for 5812
EFB CRC ERRORS or 5811 EFB UART ERRORS advances.
To correct: Check all station numbers and edit conflicting values.
Swapped wires
If the communication wires are swapped (terminal A on one drive is connected to
terminal B on another):
• The value of 5808 EFB OK MESSAGES does not advance.
• The values of 5812 EFB CRC ERRORS and 5811 EFB UART ERRORS are
advancing.
To correct: Check that the EIA-485 lines are not swapped.
Fault 3028 – EXT COMM LOSS
If the bypass’ control panel shows fault code 3028 “EXT COMM LOSS”, 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 bypass.
• The time-out selection for the bypass is too short for the given installation. The
master is not polling the bypass within the specified time-out delay. To correct,
increase the time set by parameter 3005 COMM TIME.
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