Specifications

C - 10 RSLinx – Training Guide
Scanning Modes
The emulator allows for three types of ladder scanning modes and a Halt mode:
Run Mode: continuous scanning of the program from start to finish and over again.
Single/Test Mode: one complete scan of the program from start to finish.
One Rung Mode: (See sample below) Scanning one rung at a time based on user
command.
Halt Mode: Somewhat analogous to the program mode, i.e. not scanning the
program at all (but not actually a “Program” mode in that the Emulator does not
support programming of ladder logic per se. You must make ladder logic changes
in your programming software, save the changes, and then “reload” that ladder
logic program into the Emulator).
One Rung Mode Sample
The sample below is designed to test the One Rung Scan Mode. The first rung turns on the
first input word. Rungs 1,2,3 each turn on one output bit as each rung is scanned. Rung 4
resets all the input and output bits. To see this in operation, arrange your desktop so that
you can see RSLogix5 (online) and the emulator at the same time. Then choose the One
button on the emulator, and then the Scan button several times to see the rungs execute.