User manual

IEC61131 User and Reference Manual
April 22, 2008
143
I/O Connection Reference
The term I/O hardware refers to the physical input and output devices that are accessed by
the application program in the target controller. The I/O hardware is divided into two types,
I/O boards and I/O equipment. I/O boards are 5000 Series I/O modules and controller
onboard I/O such as counter/digital inputs, interrupt input, RAM battery voltage and board
temperature. I/O equipment refers to I/O modules that contain multiple types of I/O such as
SCADAPack upper I/O module and SCADAPack lower I/O modules.
I/O Boards
I/O boards are defined using the I/O connection dialog in ISaGRAF. To open the I/O
connection dialog select I/O connection from the Project menu in the Programs window.
Refer to section A.11.1 Defining I/O boards in the User‟s Guide for complete information on
defining I/O boards and equipment.