US 2010/0199002 A1Published application

Industrial controller

AssigneeOMRON Corporation

InventorToshiro IZUMI

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Abstract

This invention realizes a synchronization control function without providing a bus dedicated for synchronization control by using a bus (system bus) used to transmit and receive data between units from the prior art. When a timer interruption occurs during the execution of a process performed in a normal cyclic, a CPU unit interrupts the process and transmits synchronization data by collective addressing using the system bus to other synchronization units performing the synchronization control. The synchronization unit executes a synchronization cycle upon the reception of the synchronization data by collective addressing as a trigger, acquires the received synchronization data with the start of the synchronization cycle, and performs a refresh process of the synchronization data of IN data after executing an input/output process. The CPU unit performs the refresh process of the synchronization data of the IN data, and obtains the synchronization data to be transmitted next by a synchronization interrupt task process. The synchronization unit constantly acquires the most recent synchronization data and simultaneously operates.

Claims6

Dependent claims

An industrial controller configured with a plurality of units for performing synchronization control, wherein

one of the plurality of units is configured to perform as a cycle master for performing a control to match an execution timing of the synchronization;
the cycle master has a function of executing,
a process of transmitting synchronization data by collective addressing using a system bus used in message transmission and IO data transmission to the other units performing the synchronization control according to a timer interruption, apart from a process performed in a normal cyclic, and
a preparation process for next collective addressing after acquiring the synchronization data of IN data of the other units and executing an interrupt task process based on the synchronization data;
and
the other units performing the synchronization control are configured to execute a synchronization cycle upon the reception of the synchronization data by collective addressing transmitted from the cycle master as a trigger, acquire the transmitted synchronization data with the start of the synchronization cycle, perform a refresh process of the synchronization data of the IN data after executing an input/output process, perform a calculation process based on the received synchronization data, and output the calculation process result after the reception of the synchronization data by the next collective addressing.

3 more elements

Dependencies are inferred from the claim text.