Lenon Patrick Posted March 26, 2020 Report Share Posted March 26, 2020 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! Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.