Fieldbus control 301
Fault 31 – EFB1
For BACnet: If the drive’s control panel shows fault 0031 EFB 1, the drive has an
invalid Device Object Instance ID. To correct, use parameters 5311 and 5317 and
establish a unique drive ID that is in the range 1 to 4,194,303.
Faults 31…33 – EFB1…EFB3
Except as noted above, these three EFB fault codes (0031 EFB 1…0033 EFB 3) are
not used.
Intermittent off-line occurrences
The problems described above are the most common problems encountered with
ACS320 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.
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