[UniLogic to PLC communication]

Hi Starlord.

have you checked in these examples?

https://unitronicsplc.com/Download/SoftwareVersions/UniLogic/UniLogic_Examples.zip

 

Good luck!

[Modbus RS485 Unilogic and Toshiba Invertes]

Hello friends.
I am using a USC B5 TA30.
This PLC is communicating with 4 frequency inverters in RS485.
I managed to establish communication but it is very unstable, the problems are as follows:
-It does not update in real time, it takes a few seconds because I need to be updating the routine call manually;
-All the inverters are configured correctly and work individually just by changing the cable between them, but when I connect them all there is no command of two or more (each with their own address);

Some data that may be relevant:
-All equipment is functional;
-They are Toshiba inverters of the VSF15 and VF-FS1 lines;
-The distance between the components is small and I'm working with 9600 Baud Rate, Parity None, Stop Bits 8;

I think the problem is in some configuration in the call of routines related to time or ModBus configuration of the UAC-CB-01RS4 cards, the RX / TX LEDs are blinking and very fast as usual in OK communication.

I already have an HMI in the same communication working on the other UAC-CB-01RS4 card, it also has a little bit of instability, but it reads and writes the data on the PLC.

can anybody help me?
Thank you very much and I wish you well!