The present disclosure provides a device for processing a programmable logic controller (PLC) program. In one embodiment, the device includes a storage containing PLC programs stored on a block basis, and a program block table defining storage locations of the PLC programs; and a controller configured: when a PLC program is modified during a PLC is operating, to determine a start address of a storage location where the modified PLC program is to be stored with referring to a block number of the modified PLC program, size information of the modified PLC program, and the program block table; and to store the modified PLC program in the storage based on the determined start address. According to the present disclosure, multiple users may simultaneously access a PLC and then may simultaneously modify PLC programs during the PLC is operating.

The present disclosure provides a device for processing a programmable logic controller (PLC) program. In one embodiment, the device includes a storage containing PLC programs stored on a block basis, and a program block table defining storage locations of the PLC programs; and a controller configured: when a PLC program is modified during a PLC is operating, to determine a start address of a storage location where the modified PLC program is to be stored with referring to a block number of the modified PLC program, size information of the modified PLC program, and the program block table; and to store the modified PLC program in the storage based on the determined start address. According to the present disclosure, multiple users may simultaneously access a PLC and then may simultaneously modify PLC programs during the PLC is operating.

A programmable controller system includes a control device; a functional device including a buffer memory and a general-purpose logic unit; and a peripheral device that creates a user program. The peripheral device includes a circuit setting unit, which sets operation data indicating the operation of a logic of the general-purpose logic unit; and a circuit-control-parameter setting unit, which sets a circuit control parameter representing the relation between a buffer memory address indicating an address in the buffer memory and a logic address indicating an address in the logic. The functional device includes a circuit control unit that transfers the operation data to the logic address on the basis of the specified buffer memory address and the circuit control parameter.

A programmable controller system includes a control device; a functional device including a buffer memory and a general-purpose logic unit; and a peripheral device that creates a user program. The peripheral device includes a circuit setting unit, which sets operation data indicating the operation of a logic of the general-purpose logic unit; and a circuit-control-parameter setting unit, which sets a circuit control parameter representing the relation between a buffer memory address indicating an address in the buffer memory and a logic address indicating an address in the logic. The functional device includes a circuit control unit that transfers the operation data to the logic address on the basis of the specified buffer memory address and the circuit control parameter.