Allen-Bradley Micro820 User Manual

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 149
Quickstarts Appendix C
Remember you cannot force a Physical Input and cannot force a Logical Output.
In many cases, the front of the controller is not visible to the operator and
Connected Components Workbench is not online with the controller. If you
want the force status to be visible to the operator, then the User Program must
read the force status using the SYS_INFO function block and then display the
force status on something that the operator can see, such as the human machine
interface (HMI), or stack light. The following is an example program in
Structured Text.
If the front of the controller is visible, and not blocked by the cabinet enclosure,
Micro830 and Micro850 controllers have a Force LED indicator.
I/O Forces After a Power Cycle
After a controller is power cycled, all I/O forces are cleared from memory.

Allen-Bradley Micro820 Specifications

General

Processor	32-bit
Power Supply	24V DC
Programming Software	Connected Components Workbench
Series	Micro800
Mounting	DIN Rail
Memory	Embedded
Expansion	Yes
Controller Type	Programmable Logic Controller (PLC)
Communication	Ethernet/IP
Programming Language	Ladder Diagram, Function Block Diagram, Structured Text
I/O	Embedded