Multiple program storage within a programmable logic controller system
OwnerJames E. Grimes, William Marion Huntley, Jr.inventors
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Abstract
Methods and apparatus for a memory device host that stores and retrieves program and data information for multiple CPU-based modules in a programmable logic controller system are described. In one embodiment, the memory host module is configured to store multiple programs and corresponding data within the memory of the memory host module and further configured to retrieve programs and data from the memory of the memory host module for storage in other CPU-based modules.
Claims27
A method for storage and retrieval of programs and data within a PLC system, the PLC system including a plurality of modules including a memory host module including a CPU and memory, at least one option module including a CPU and memory, the at least one option module including a first option module and a second option module, the first module including a memory, a backplane interconnecting the memory host module and the at least one option module, the memory host module coupled to an external device, said method comprising the steps of:
- storing a plurality of operating programs and data including a first and a second operating program and data in the external device coupled to the memory host module, wherein the first operating program and data corresponds to the first option module and the second operating program and data corresponds to the second option module;
- retrieving the first operating program and data;
- retaining the second operating program and data;
- and
- transmitting the first operating program and data to the first option module.
A memory host for a programmable logic controller (PLC) system, the system comprising at least one option module further comprising an option module memory, said at least one option module including a first option module and a second option module, said first option module including a memory, said memory host comprising a memory, a central processing unit (CPU), and a backplane interface, said memory host coupled to an external device and configured to:
- retrieve a first operating program and data, wherein the first operating program and data corresponds to said first module;
- retain a second operating program and data, wherein the second operating program and data corresponds to said second module;
- and
- transmit the first operating program and data to the first option module, wherein said external device is configured to store a plurality of operating programs and data including the first operating program and data and the second operating program and data.
Dependencies are inferred from the claim text.