A method includes receiving, at a first processing device of an input/output module (IOM), new firmware data for the IOM. The method also includes sending an output hold command from the first processing device to a second processing device of the IOM. The method further includes upgrading firmware of the IOM with the new firmware data using the first processing device and attempting a reboot of the first processing device. In addition, the method includes, in response to the output hold command and during the upgrading of the firmware and the rebooting of the first processing device, using the second processing device to cause a field circuit of the IOM to hold at least one previous output signal for one or more external devices.

On-process migration of non-redundant input/output (i/o) firmware

Provided is a control device comprising a communication management part, a computation part, and a result output part. The communication management part is for managing a data communication using a cyclic communication conforming to a prescribed communication cycle with respect to a field network. The computation part is for measuring a propagation delay time from received data corresponding to actual measurement data for a propagation delay having been transmitted to the field network, and detecting an operation state of the field network using the propagation delay time measurement result. The result output part is for outputting the result of the detection performed by the computation part.

Control device, control method, and control program

To reduce the influence of a jitter on the control of a device to be controlledSOLUTION: A control system 1 includes a control unit 21 that controls a control target device 10; and at least one communication processing unit 31, 32 that performs communication processing in communication between the control target device and the control unit The communication processing unit sequentially measures processing times in the communication processing, sequentially outputs delay information indicating the measured processing times to the control unit The control unit sequentially acquires the delay information from all of the communication processing units, and sequentially updates the delay information incorporated in a control algorithm for controlling the control target device based on the acquired delay informationSELECTED DRAWING: Figure 2

Control system and control method

PROBLEM TO BE SOLVED: To provide an instrument diagnosis device, instrument diagnosis method, and an instrument diagnosis program capable of obtaining a useful diagnostic result of an instrument without causing a significant increase of a communication loadSOLUTION: An instrument diagnosis device 30, which performs diagnosis of a field instrument 10 which is installed in a plant and is connected to a field network N1, intermittently obtains an instrument parameter of the field instrument 10 via the field network N1, performs statistical arithmetic using the obtained instrument parameter to obtain a statistic value, and performs diagnosis of the field instrument 10 on the basis of the statistic value and a reference value which is obtained by performing statistical arithmetic using an instrument parameter that is obtained when the field instrument 10 is in a normal conditionSELECTED DRAWING: Figure 1

Instrument diagnosis device, instrument diagnosis method, and instrument diagnosis program

Provided is a mechanism for facilitating determination processing that uses a plurality of measurement values. A control apparatus for controlling a control target is provided. The control apparatus includes: an acquisition unit configured to acquire a measurement value related to the control target; a determination unit configured to determine whether or not the control target is in a predetermined state based on a plurality of measurement values acquired at predetermined points in time, or based on temporal changes in a plurality of measurement values detected during a predetermined period of time; and a delay time adding unit configured to add a predetermined delay time to at least one measurement value out of the plurality of measurement values that are used by the determination unit to perform determination.

Control apparatus, control program, control system, and control method

A process control system includes: a controller; at least one input and output module connected to the controller; and an allowable propagation delay value calculator in the controller, the allowable propagation delay value calculator being configured to calculate, based on the number of input and output modules connected to the controller, an allowable range for propagation delay time between the controller and the input and output module

Process control system

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Process control system