Control apparatus having remote PLC device and control method for same
First Claim
1. A control apparatus comprising a main control section and a plurality of remote PLC devices connected via a communication line to said main control section;
- wherein said main control section comprises;
a PLC computing unit managing an entire system comprising said main control section and said plurality of remote PLC devices;
and a remote PLC communication control section executing data transaction through said communication line with said plurality of remote PLC devices, and also wherein each of said plurality of remote PLC devices comprises;
a communication control section executing data transaction via said communication line with said main control section;
a memory section for storing therein a sequence program transmitted via said communication line and specific to a specified remote PLC device;
a machine input/output I/F section executing data transaction with an external machine controlled by said specified remote PLC device; and
a PLC computing section for executing PLC processing with said sequence program according to at least data transmitted from said main control section and data obtained from said machine input/output I/F section.
1 Assignment
0 Petitions
Accused Products
Abstract
In a control apparatus including a main control section and a plurality of remote PLC devices each connected to the main control section, the main control section has a PLC computing unit controlling the entire system and a remote PLC communication control section executing data transaction via a communication line with the plurality of remote PLC devices, and each remote PLC device including a communication control section executing data transaction via a communication line with the main control section, a memory section for storing therein a sequence program transmitted through the communication line and specified to the remote PLC device, a machine input/output I/F section for executing data transaction with external machine controlled by the remote PLC device, and a PLC computing section for executing PLC processing according to a sequence program and based at least on data transmitted from the main control section and data obtained from the machine input/output I/F section.
90 Citations
16 Claims
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1. A control apparatus comprising a main control section and a plurality of remote PLC devices connected via a communication line to said main control section;
- wherein said main control section comprises;
a PLC computing unit managing an entire system comprising said main control section and said plurality of remote PLC devices; and a remote PLC communication control section executing data transaction through said communication line with said plurality of remote PLC devices, and also wherein each of said plurality of remote PLC devices comprises; a communication control section executing data transaction via said communication line with said main control section; a memory section for storing therein a sequence program transmitted via said communication line and specific to a specified remote PLC device; a machine input/output I/F section executing data transaction with an external machine controlled by said specified remote PLC device; and a PLC computing section for executing PLC processing with said sequence program according to at least data transmitted from said main control section and data obtained from said machine input/output I/F section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- wherein said main control section comprises;
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13. A method of controlling with an control apparatus comprising a main control section and a plurality of remote PLC devices each connected via a communication line to said main control section;
- wherein said main control section determines the number of units of said plurality of remote PLC devices, ID numbers for said remote PLC devices, and switch information in an offline transfer mode, downloads a sequence program previously set in a specified remote PLC device, initializes said specified remote PLC device, provides an instruction for start of PLC processing to said specified remote PLC device, and said specified remote PLC device repeats execution of said PLC processing for data specified according to a sequence program specific to said specified remote PLC device until said device receives a stop command from said main control section and executes cyclic data transaction between said main controls section and said specified remote PLC device with a cycle not dependent on operation of a CPU in said main control section.
- View Dependent Claims (14, 15, 16)
Specification