Lenze SMVector RS-485 LECOM User Manual

Page 28

CMVLC401A

Troubleshooting and Fault Elimination

10.1 Faults

Table 11 lists the faults common to the LECOM communications module.

Table 11: Faults

Fault Code Fault

Cause

Remedy

Module to Drive
communication time out

Connection between drive and
module is not made.

Check cable and connection
between module and drive

Network Time-out Fault

Drive under NETWORK control
and network communications
have been lost.

See parameters P425, P426

10.2 Troubleshooting

Table 12 lists some common LECOM communications problems and possible corrective action.

Table 12: Troubleshooting

Symptom

Possible Cause

Remedy

No communication
from the drive

Module is not initialized properly

• Verify the module connection
• Check P400 and P402

Incorrect LECOM settings

• Use P403 to reset LECOM parameters.
• Verify P410 and P411

Improper wiring

• Check wiring between the LECOM Network and

communication module.

• Ensure that terminal block is properly seated.
• Check connection between module and drive.

LECOM write
commands are
ignored or return
exceptions.

“Network Enabled” terminal is either
open or not configured.

Configure one of the input terminals (P121 ... P124)
to “Network Enabled” function (selection 9) and close
the corresponding contact.

Network Control Level set to monitor only
(P420 = 0)

Set P420 = 1, 2, 3 or 4

Drive stops without
obvious reason

LECOM message monitoring time-out
occurred. The timeout reaction is set to
Quick stop or Inhibit.

Modify the setting of time-out time (P425) or the
reaction to the time-out (P426).