job517

Good morning to all I am using a USC-X5-TR22 PLC on unilogic version 1.32.98 (attached image shows core of the issue) my question is how does the modbus read/write is executed? Does it read the registers every 200 millisecond? Does it read sequentially or concurrently? If so, is it safe for me to have so many registers that I am reading? Also from the attached image you can see that I have a number of modbus devices from which I am reading the same amount of registers. This system is currently running, all I want to know is if it will stay that way. Thank you for your responses

@Flex727Thank you I think what you suggested is the right solution

Thank you both @Joe Tauser and @dierkens I am using Real data type because I have to keep track of liters reading input by the operator. It has to be REAL data type since the reading is of the form 12345,12. But now with the inaccuracy of the REAL data type, summing up these values does not reflect the actual real world situation. @dierkens did mention a difference of 0.000038467575848% but i have seen value like 10.7 be saved as 10.625. Are there rounding functions I can use to solve this issue? Thanks again

Hi I am new to this forum so bear with me if I am not respecting some of your rules. I have encountered an issue working with data table. I m writing a real value to a data table, but the value displayed on the HMI is different from the original value. you can see in the attached images what I am describing. How can I prevent this ? My controller is a unistream USC B5 TR22. Thank You in advance