Patent ID: 7725635

Claim:
A method of determining request transmission priority subject to request channel and transmitting request subject to such request transmission priority in application of Fieldbus communication framework, comprising the steps of: (a) transmitting a plurality of external requests from a remote control end to a communication device one after another, and the communication device receiving the external requests; (b) the communication device determining whether the request channel from which the received requests came has a priority right; (c) the communication device determining whether there is at least one logical operation condition established, wherein the logical operation condition includes an on/off switch function settable by a user; (d) the communication device coupling the logical operation conditions and the priority right of the request channel on which the received external requests came; (e) the communication device determining whether the received external requests have a priority to transmit; (f) the communication device transmitting to a slave device the received external requests that do not have the priority to transmit as ordinary requests; and (g) the communication device transmitting to a slave device the external requests that have the priority to transmit as a priority request.