Hello everyone,
Perhaps someone already faced with similar problem.
I have PLC and decentral periferie module IO, where is installed Serial Interface module. To interface of this Serial Module is connected an usual transducer which is capable to communicate by RS-485 bus.
I have a list of commands and adequate answers for this device.
For example:
- I transmit a query :ADR?; an adequate answer should be: 31CRLF;
I see that in buffer exactly 4 characters. However they are looking differently (there's so called character's distortion).
However, after quite long shutdown (allegedly, I'm not sure that was a reason), I made a query and I had got adequate answer. After that I made second query (to be sure if it's became working), and I had got four distorted characters as I wrote at the beginning.
Communication settings: both are identical;
Cable length: less than 1 meter.
Cable type: twisted pair, copper multistrand wire;
So, any comments on this matter, please
Perhaps someone already faced with similar problem.
I have PLC and decentral periferie module IO, where is installed Serial Interface module. To interface of this Serial Module is connected an usual transducer which is capable to communicate by RS-485 bus.
I have a list of commands and adequate answers for this device.
For example:
- I transmit a query :ADR?; an adequate answer should be: 31CRLF;
I see that in buffer exactly 4 characters. However they are looking differently (there's so called character's distortion).
However, after quite long shutdown (allegedly, I'm not sure that was a reason), I made a query and I had got adequate answer. After that I made second query (to be sure if it's became working), and I had got four distorted characters as I wrote at the beginning.
Communication settings: both are identical;
Cable length: less than 1 meter.
Cable type: twisted pair, copper multistrand wire;
So, any comments on this matter, please