Answer by Tobias Kienzler for Best way to poll for Modbus RTU servers through...
While there are no guaranteed addresses or registers, theoretically via Function 43 (0x2B)'s 0x2B/0x0E Read Device Identification (see 6.21 in the standard) you should be able to at least query the...
View ArticleAnswer by avra for Best way to poll for Modbus RTU servers through a Modbus...
MODBUS masters start polling of all slaves on the same physical channel, and then the ones that timeout for N times are the ones that should be considered not responding. It's up to a MODBUS master...
View ArticleAnswer by akohlsmith for Best way to poll for Modbus RTU servers through a...
There are no guaranteed addresses or registers with ModBus; that's one of its biggest failings (or one if it's greatest strengths, depending on how (in)experienced you are in the field). There have...
View ArticleBest way to poll for Modbus RTU servers through a Modbus TCP gateway
I'm using a number of Modbus RTU devices connected to my PC through a Modbus TCP gateway. I'd like to poll all the available server addresses to check which ones are available through my program.What...
View Article
