Lenze SMVector RS-485 LECOM - Manual (Page 20)

18 CMVLC401A
Commissioning
7 Commissioning
7.1 Drive Monitoring
The network can always read drive parameters as long as the LECOM communications are enabled (i.e. P400 = 7) and
configured properly (see P410-411). For monitor only operation, set P420 = 0.
7.2 Drive Programming and Control
Network Control must be enabled for the network to program drive parameters or take control of a drive. This is done by:
1. Setting P121…P124 equal to 09 (NET ENABLE) and asserting the corresponding TB-13x terminal
2. Setting P100 to 00, 01, 03, 04 or 06. Network control cannot be enabled when P100 is set to 02 (REMOTE KEYPAD
ONLY) or 05 (TERMINAL STRIP/REMOTE KEYPAD).
3. Setting P420 to 01, 02 or 03.
7.3 Network Watchdog Timer
7.3.1 Watchdog Timer
The SMV is equipped with a Serial Link “Watchdog Timer”. If the Watchdog Timer is enabled, the Master MUST
PERIODICALLY COMMUNICATE with the drive or the timer will timeout.
Watchdog timer setup is performed by using parameters P425 and P426 (LECOM codes C1425 and C1426).
7.3.2 Watchdog Time-out Period (P425)
The maximum amount of time that should be allowed to pass between network messages to a specific drive will vary from
one network to the next. Therefore, we have made the watchdog time-out period user settable via Drive Programming
Parameter P425 (refer to section 4.2 for details).
NOTE
To prevent erroneous timeout trips, make sure the time set in parameter P425 (C1425) is appropriate for
particular network - default value of 50ms might be to restrictive!
7.3.3 Watchdog Time-out Action (P426)
The appropriate action to be taken when a watchdog time-out occurs will also vary from one application to the next.
Therefore, we have provided four user selectable time-out actions which can be set via Drive Programming Parameter
P426.
The selections are:
0)
No action Watchdog timer is disabled.
1) Controller inhibit If the drive doesn’t receive valid communication for period longer than the time specified in
parameter P425 (C1425), it will coast to stop and drive display will show inhibit state ‘Stop’.
2) Quick Stop If the drive doesn’t receive valid communication for period longer than the time specified in
parameter P425 (C1425), it will ramp to stop and drive display will show stop state ‘Stop’.
3) Trip fault ‘F.nF1’ If the drive doesn’t receive valid communication for period longer than the time specified in
parameter P425 (C1425), it trips with fault ‘F.nF1’.
WARNING!
Disabling the watchdog timer may cause injury to personnel and/or damage to equipment. The watchdog
timer should only be disabled during configuration or diagnosis to prevent nuisance timeout trips.