Patent ID: 7529293
Filing Date: 2009-05-05
Classification: G08C

Abstract:
1. A method of diagnosing errors in an industrial process control system comprising: receiving, from a carrier loop using an industrial field device modem, a signal communicating a message that is related to an industrial process and that is sent by an industrial field device; determining, using the industrial field device modem, whether an amplitude of the received signal is within a predetermined operating range; accessing, using the industrial field device modem, a parity bit included in the message communicated in the received signal; determining, using the industrial field device modem, whether the message communicated in the received signal has a parity error based on the parity bit; generating, using the industrial field device modem, diagnostic data based on the determination of whether the amplitude of the received signal is within the predetermined operating range and the determination of whether the message communicated in the received signal has a parity error; providing, from the industrial field device modem to an industrial process control device, the message communicated in the received signal; and providing, from the industrial field device modem to the industrial process control device, the generated diagnostic data.