Rs485 communication between PLC samba and VFD unitronics

[t0r3r0s]

Can someone help , I cant make communication between Samba 70 j T20 with Rs485 communication card  and Unitronics VFDs ,

I want to make just control of speed and start stop of VFD, but cant make communication .

In attach is my code, can someone help .

 

Thank you

Trake.vlp

[kratmel]

Some tips:

1) You must start to use UMI via blank project and configure 1 VFD.  

2) Configured Umi can be controled via simple UMI command (from UMI menu) and by changing speed and torqe variables defined in configuration.

3) Is it dip sw on RS485 comm card in correct = RS485 + termination?

4) Is it cable from UMI to RS485 card connected properly?

 

P.S.  I do not find any UMI inverters on din rail in Visilogic HW config of your project.

ADD UMI to project = add some hidden subroutine that is not visible for user.

You must try start to use UMI via project from example for configure 1 VFD.  

[t0r3r0s]

4 hours ago, kratmel said:

Some tips:

1) You must start to use UMI via blank project and configure 1 VFD.  

2) Configured Umi can be controled via simple UMI command (from UMI menu) and by changing speed and torqe variables defined in configuration.

3) Is it dip sw on RS485 comm card in correct = RS485 + termination?

4) Is it cable from UMI to RS485 card connected properly?

 

P.S.  I do not find any UMI inverters on din rail in Visilogic HW config of your project.

ADD UMI to project = add some hidden subroutine that is not visible for user.

You must try start to use UMI via project from example for configure 1 VFD.  

Greeatings , i dont use umi , i Have 3 vfds , and samba can only with 2 , 

Dip switch are 1 2 3 4 are on and the 5 6 OFF

I get cable form unitronics two wire one blue and it is on pin 1 and bluewhite it is pin 6 ,

1 pin +Rs485 on VFD

6pin -RS485 on VFD

 

have you any other solution

[kratmel]

3 hours ago, t0r3r0s said:

have you any other solution

You must post VFD model # and (or) VFD communication manual.

All of  VFD must be configured before connect to any communication (network ID, comm speed, start command source and speed command source must be defined).

After that you must use PC Modbus software (and USB-RS485 dongle) for test communication and VFD operation. Only after success with this step you can try to set VFD - PLC communication.

 

[DanT]

Hi;

 

A Note from Experience.

A SAMBA PLC has Limited Memory !!

When Adding  Unitronics VFD   Functon blocks  to a SAMBA, it takes up a lot of that available memory and leaves only a small amount for actual application programming.

User program will have to be very small.

( In our case, customer ended up using Small UniStream PLC   to handle the program and the VFD)

 

DanT