Reading normal variable by channel driver in CFC

hello everyone,

I'm new in PCS7 system and i'm working with PCS7 v9.0. I try controll pumps with inverter(alitvar 610) and I'm using to do it MotSpdCL (FB1854). But i have problem with read and write frequency to  inverter. PLC(s7-410-5h) is connect to this inverter by profibus DP. And when i'm using FB like 'Pcs7AnIn' or 'Pcs7AnOu' and i try connect  variable from inverter DP to 'Pv-In'  It' s not working(  no green automatic connection on FB and variable on output ). So I understand that this kind of FB is only for readin/wrintg physical analog value, right  ? Can you tell me what kind of FB i should use ? Or maybe it's possible to change setting in chanels driver FB(Pcs7AiIn/Ou) to wroking with all kind od signals( form DP and for exampel from Data block to )

Hi mory

Yes you are correct that you can't connect a PCS7 channel driver to a ProfiBus DP slave address that is not an ET200 IO card.

You need to use FbDrive (FB1905) from the APL library or create your own interface manually.

I've used Altivair drives on a couple projects and find that creating my own interface in SCL is better than using FbDrive block because of the supported message frame interactions:

FbDrive supports only message/telegram 1 and  20.

Altivair drives with the ProfiBus module support telegrams 1, 101, 102, 106, and 107.  I contacted Schneider about support of telegram 20 in their product, but they didn't seem to care or have any plans to do so.

If you only need command/status word and ref/speed then you can use telegram 1 and FbDrive. 

Typically our customers want to see drive amps and some other information from the drive, so we use telegram 102 which supports the same base as telegram 1, but contains a total of 6 PZD, leaving 4 PZD for free configuration.  I have created a custom block in SCL to handle the interface based on the custom configuration of the VFD for the extra 4 PZD data to be shared in those cases.