Patent ID: 8117434
Filing Date: 2012-02-14
Classification: G06F

Abstract:
1. A circuit module of a programmable logic controller (PLC) comprising: an internal memory configured to store stored configuration information; a communication interface configured to obtain external configuration information from an external configuration source comprising: a processor configured to support a first component that is associated with a web-based configuration; and, a non-transitory computer-readable medium comprising computer-executable instructions that when executed by the processor, perform a method to determine a configuration scenario and to select a configuration source based on the configuration scenario, wherein the configuration source is either the internal memory or the external configuration source, the method comprising: comparing a first redundancy check stored in the circuit module with a second redundancy check stored in the controller module, wherein the first redundancy check and the second redundancy check are associated with the first component; and comparing a first circuit module (CM) configuration time stored in the circuit module with a second CM configuration time stored in the controller module.