1. A message monitor within a node, in a process control network environment, separate from a control processor, the message monitor comprising: a message table including a set of message table entries, each entry comprising: a message ID, and a command ID; a message monitoring functionality for receiving a message from the control processor; and a command execution functionality for: identifying the received message as a variable definition message when the received message includes a mode variable, wherein a value of said mode variable is representative of an operation mode of the process control network environment transitioning from one mode to another mode, responsive to the identification of the received message as a variable definition message, updating a dynamic message priority value with the value of the mode variable of the received variable definition message to reflect the transition of the operation mode of the process control network environment, identifying the received message as a categorized message when an entry in the message table has a message ID corresponding to a message ID value of the received message, responsive to the identification of the received message as a categorized message, determining a dynamic priority value of the categorized message, re-prioritizing the categorized message by updating the dynamic priority value thereof with the updated dynamic message priority value to reflect an operation mode of the process control network environment transitioning from one mode to another mode; and responsive to the reprioritization of the categorized message, initiating execution of a command associated with the command ID, said command ID being the entry in the message table for the categorized message, wherein the message monitoring functionality and the command execution functionality each comprises software executed by one or more hardware processors.