Product Description
The Main Chassis has a four-position key switch which controls all the chassis in the system. The key switch setting is readable by Tricon controllers, TriStation 1131 software, and the control programs. Switch settings are RUN—Normal operation with read-only capability. The Main Processors execute the previously-loaded control program. Attempts to modify program variables by TriStation 1131, Modbus masters or external hosts are rejected. However, a control program may call gated access functions to enable external host writes during a designated window of time.
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