MVP 2021 Flex727 Posted April 5, 2014 MVP 2021 Report Share Posted April 5, 2014 I am fairly experienced with Unitronics PLCs and have done quite a few projects requiring communications with no major problems encountered until now. On this project I am sending data from one V570 PLC to another using MODBUS IP over Ethernet. My need is to send 160 registers (MIs) using R.H.R #3. I've found that I cannot send more than 125 registers without encountering status errors 4, 5, & 6. Is this to be expected? Are there any tips on how to handle this? If I were to break it down to two separate reads, what would be the best procedure - should there be a delay between the two reads? Thanks. Quote Link to comment Share on other sites More sharing options...
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