VisiLogic and VFD
Ofir Levi
Sep-13th, 2018 7:46

Unitronics UMIs, or Unitronics Motion Inverters, are VFDs that work seamlessly with Vision and Samba, as well as UniStream controllers.

Communicating via Modbus RTU , they are general purpose VFDs, available as single and three phase, from 0.4 kW up to 110 kW.

Configuring Unitronics VFDs in VisiLogic:

When you add a VFD to your Hardware configuration:

  • VisiLogic automatically adds subroutines and data tables to your application that enable you to run the VFD from your application. These subroutines are hidden as they are intended to run 'as is'. For advanced users that wish to add functionality to the existing subroutine – please contact support@unitronics.com for further instructions.

  • VisiLogic reserves 'Global' operand vectors of MB, MI, and DW. You may change the start operand of a vector, but you may make no other changes, or use the operands in these vectors in your application. Doing so may cause your application to fail.

  1. In Hardware Configuration, select UMIs from the Hardware Element selection bar, and drag a VFD to the DIN rail; the Configuration window opens.

  2. Select the serial port that is to be connected to the VFD.

  3. Under Global, you can edit the start operands of the Global Vectors; these operand vectors are reserved for use in the VFD subroutines.

  4. Under Motor, enter the parameters of your specific motor model.

  5. Under VFD & Control (1), link operands for Frequency Request and Torque Request; you will use these in your program to control Frequency and Torque. Edit the values in VFD & Control (1) and VFD & Control (2) according to the parameters of your UMI model and application requirements. These parameters will be written to the data table created by VisiLogic, Configuration. Note that in this data table, VisiLogic adds a row to contain the data for each UMI you include in your application.

  1. 6.When you are done, click OK.

Note that VisiLogic has added:

 

  • Data Tables: - A Configuration table containing the parameters that the controller will write to the VDF - A Status table that you can use to manage and debug your motion control.

  • New net in the  main routine that calls UNI_UMI_Main that will run the VFD logic.

 

Using Unitronics VFDs in VisiLogic

Sending Commands to the 

1. On the Ladder toolbar, under the Utils menu, select UMI Send Command.


2. Select the Modbus ID of the desired VFD


3.Select the desired command


Command numbers

1

Run Forward

2

Run Reverse

3

Jog Forward

4

Jog Reverse

5

Stop Run

6

Reserve

7

Fault Reset

8

Stop Jogging

9

Set Frequency

10

Run Torque

11

Write Configuration Parameters

12

Read Configuration Parameters

13

Read Status

 

Configuring the VFD

After you download the application, you must write the parameter values in the Configuration and Status data tables, and then write them to the data tables in the PLC.

  1. In the Navigation Tree, Click Data Tables, then the Read Write icon.

  2. Select both table via CTRL + right-click, then select Write Tables.

3.In your Ladder application, write the configuration parameters via UMI Command #11, Write Configuration Parameters, as shown in the rung below.

You can also read the parameters from a VFD into the Configuration data table, via command #12 Read Configuration Parameters.

Controlling the VFD

You can send control commands to the VFD, such as Run Forward, Run Reverse, Stop, etc.

The rung below shows how to sends command 1 – Run Forward.

Reading Status:

You can read the UMI status using command 13.

The VFD statuses values will be written to data table "Status Table".



Checking Errors

In order to check whether a command was successfully executed or failed, you can read the column "Subroutine status" from the Configuration data table.

First find the MODBUS ID of the VFD in the data table and then read the subroutine status.

Note that each time a command is sent to the VFD, the data table column "Subroutine status" is updated).

If the value is negative then there is an error with the last command sent to the VFD.


VFD Error Codes:

Status

Description

0

No errors

1

In progress

-1

Failed Reading Speed control mode

-2

Failed Reading Run command channel

-3

Failed Reading Max. output frequency

-4

Failed Reading Upper limit of the running frequency

-5

Failed Reading Lower limit of the running frequency

-6

Failed Reading Frequency command selection A

-7

Failed Reading Acceleration Time

-8

Failed Reading Declaration Time

-9

Failed Reading Running direction selection

-10

Failed Reading Motor power

-11

Failed Reading Motor Frequency

-12

Failed Reading Motor speed

-13

Failed Reading Motor voltage

-14

Failed Reading Motor current

-15

Failed Reading Jog Frequency

-16

Failed Reading Jog Acceleration Time

-17

Failed Reading Jog declaration Time

-18

Failed Reading Torque setting Method

-19

Failed Reading- Source of Forward Rotation

-20

Failed Reading- Source of Reverse Rotation

-23

Failed Writing Speed control mode

-24

Failed Writing Run command channel

-25

Failed Writing Max. output frequency

-26

Failed Writing Upper limit of the running frequency (Please check that the value is not greater than Max output frequency or lower than lower limit of the running frequency)

-27

Failed Writing Lower limit of the running frequency  (Please check that the value is not greater than Max output frequency or greather than upper limit of the running frequency)

-28

Failed Writing Frequency command selection A

-29

Failed Writing Acceleration Time

-30

Failed Writing Deceleration Time

-31

Failed Writing Running direction selection

-32

Failed Writing Motor power

-33

Failed Writing Motor Frequency

-34

Failed Writing Motor speed

-35

Failed Writing Motor voltage

-36

Failed Writing Motor current

-37

Failed Writing Jog Frequency

-38

Failed Writing Jog Acceleration Time

-39

Failed Writing Jog deceleration Time

-40

Failed Writing Torque setting Method

-41

Failed Writing-Source of Forward Rotation

-42

Failed Writing-Source of Reverse Rotation

-43

Failed Writing-Upper limit frequency setting during forward

-44

Failed Writing-Upper limit frequency setting during reverse

-45

General reading status error

-46

Failed to Send Run Forward

-47

Failed to Send Run Reverse

-48

Failed to Send Jog Forward

-49

Failed to Send Jog Reverse

-50

Failed to Send Stop Run

-51

Failed to Send Fault reset

-52

Failed to Send Stop Jogging

-53

Failed to Send Set Frequency

-54

Failed to Send Torque value (Please check that Speed control mode P00.00 is 0 or 1 and Torque setting mode selection should be 7 (MODBUS))

-999

Slave ID (VFD) not found (Please check if the ID exist in Data table column MODBUS ID)

 


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