Abstract: An information processing system configured to create and debug a control program executed in a control device, the information processing system includes at least one server device and a plurality of client devices. The at least one server device is configured to operate in a cloud environment to which a plurality of client devices are connected via a network; configure a virtual machine in the cloud environment; virtually configure the control device as a virtual control device in the virtual machine; compile the control program; and execute the control program in the virtual control device. The plurality of client devices is configured to transmit a request for compiling the control program in the virtual machine to the server device; and transmit a request for executing content of the control program in the virtual control device to the server device.

Abstract: According to one embodiment, control program management device includes storage, transmitting unit, updating unit, and retaining unit. The transmitting unit transmits control program to first device. The updating unit updates, when the control program is transmitted to the first device, permission so as to prohibit second device from editing the control program. The retaining unit retains, based on information transmitted from the first device when the control program is transmitted to the first device, unique information identifying the first device and the control program. The transmitting unit further transmits, to the first device, inquiry of whether the first device is editing the control program. The retaining unit deletes the unique information when the first device is not editing the control program. The updating unit releases the permission so as to permit the second device from editing the control program when the first device is not editing the control program.

Abstract: A debug system is provided with a control program compilation processing unit 11a that generates a control program for producing a first instruction for designating a connecting state on an input side of a connecting point with respect to the connecting point for connecting symbols, its connecting destination, a first internal variable, a second instruction for designating a connecting state on an output side of a connecting point and its connecting destination, and a second internal variable; and a wire force processing unit 11b that commands that the first instruction and the first variable are rewritten to a third instruction and a third variable or that either one of the first instruction and the first variable is rewritten to the third instruction or the third variable and commands that the second instruction and the second variable are rewritten to a fourth instruction and a fourth variable or that either one of the second instruction and the second variable is rewritten to the fourth instruction or the