Drives

[Sambo]

I am currently experiencing problems with a couple of SMC Flex softstarters which are connected over DeviceNet to a CompactLogix system.  It seems that one of two faults may occur.  I have not personally attended any of the problems and are onlyrelaying information given to me.

1. The SMC Flex seems to lose their configured data for apparently no reason.  I have told the client to ensure that after he has reprogrammed them that he must save the data to Eprom and he has assured me that he has done this but the configured data loss still occurres from time to time.

2.  According to the client it seems that the comms between the PLC and SMC Flex "freezes".  It does not accept a start command over the network but when a hardwired start command is issued it starts ruling out the possibility that the "enable" is missing.

The firmware revision is 3.006 and ADR is enabled.

[fuzzy_logic]

Sambo, obviously the best is to be on site and see what happens exactly, which fault code is displaied etc...

Anyway, there is a known issue on ADR and SMC-Flex firmware revision 3.006 and earlier, as reported in Aid 30710... also there are two new firmwares for v5 and v6 that replace the original inside some SMCs which exibits the same error ( Aid 55159).

Maybe the problem out there is coming from improper ADR functionality... 

Hope that helps....

- fuzzy logic

[vikas]

Sambo,for the first problem given i think the required solution is only save to eeprom.

For the second problem mentioned,make sure SMC-Flex should be 3-wire controlled otherwise it wouldn,t accept start command from PLC.

Hope it helps.

[Sambo]

Agree to being on-site.  My coleague, a junior engineer, tells me that there are no fault code displayed.  Which to me is strange.  The only reason I can think of is that comms actually does freeze up in the SMC and that it still thinks it is communicating to the PLC although it is not.  Highly unlikely but possible I suppose.

I will try to do a firmware upgrade and see whether that will solve the problem.

[vikas]

Sambo,did you find out whether SMC is 3-wire or 2-wire controlled?

[PLC_SCADA]

Hello Friends,

I am using about 30 number of 150-SMC-Flex devices on DeviceNet with 20-COMM-D Series-B module. I have installed the modules and the LEDs PORT/MOD/NET-A are steady Green. I have programmed the 150-SMC-Flex for Soft Start and Soft Stop Parameters. I am trying to give DeviceNet Out Signal to start the motor connected to 150-SMC-Flex.

For this Motor to start I have enabled Logic Command bit 1 to ON State.
In my PLC program, controller tags: Comm_Rack_DeviceNet:2.Data[0] to Comm_Rack_DeviceNet:2.Data[4] are mapped for DNET Node Output and
Comm_Rack_DeviceNet:2:I.Data[0]to Comm_Rack_DeviceNet:2:I.Data[4] are mapped for DNET Node Input.

 By this mapping, my plc logic makes bit Comm_Rack_DeviceNet:2.Data[0].1 == ON making sure that Comm_Rack_DeviceNet:2.Data[0].0 == OFF, Comm_Rack_DeviceNet:2.Data[0].8 == OFF, Comm_Rack_DeviceNet:2.Data[0].9 == OFF.

For some reason the motor is not getting started and the 150-SMC-Flex LEDs remain Steady Green and LCD displays "Stopped".

Am I missing anything? Please help me to rectify this issue. I appreciate your any help in advance!

Best Regards,

Pramod