You can view any SIS module downloaded to a logic solver (CSLS or SLS 1508) in Control Studio on-line mode. In SLS 1508 simulation systems, you can open an SIS module downloaded to a workstation (simulated SLS 1508 logic solver) in on-line mode. The Logic Solver must be unlocked for a module to be opened in on-line mode.
In on-line mode you can change only writeable parameters to a module downloaded to a physical logic solver. If you are viewing a module downloaded to a simulated Logic Solver, you can also manipulate SIMULATE parameters of input blocks.