How can I use the control bits to control Scanning in an M580?
The attached simple application controls the I/O scanning of an M580 PLC by manipulating the control bits.
There are four Modbus/TCP devices being scanned. They are scanned one at a time, each for 10 seconds. Basically a 10 second timer will be enabled while the control bit is set to 0. When the timer reached 10 seconds the control bit is set to 1 (turning off the scanner) the timer is reset and the next timer is enabled and the next control bit is set to 0 turning on scanning to the next device. When the fourth scan is finished the first one is enabled and so on.
There are four Modbus/TCP devices being scanned. They are scanned one at a time, each for 10 seconds. Basically a 10 second timer will be enabled while the control bit is set to 0. When the timer reached 10 seconds the control bit is set to 1 (turning off the scanner) the timer is reset and the next timer is enabled and the next control bit is set to 0 turning on scanning to the next device. When the fourth scan is finished the first one is enabled and so on.
Udgivet til: Schneider Electric Danmark
Brug for hjælp?
Produktvælger
Find hurtigt og nemt de rette produkter og det rette tilbehør til dine anvendelser.
Få et tilbud
Start din salgsforespørgsel online, så vil du blive kontaktet af en ekspert.
Find forhandler
Find den nærmeste Schneider Electric-distributør.
Hjælpecenter
Find supportressourcer til alle dine behov på ét sted.