1
Download CompactLogix Controllers
Transcript
Develop Applications 77 Determine if Device Communication Has Timed Out If communication times out with at least one device (module) in the I/O configuration of the controller, the I/O LED on the front of the controller flashes green. • The GSV instruction gets the status of the I/O LED and stores it in the I_O_LED tag. • If I_O_LED equals 2, the controller has lost communication with at least one device. GSV Get System Value CIP Object Class MODULE CIP Object Name Attribute Name LedStatus Dest I_O_LED EQU Equal Source A I_O_LED Source B 2 where: I_O_LED is a DINT tag that stores the status of the I/O LED on the front of the controller. Publication 1769-UM011F-EN-P - January 2007
