Master device, arithmetic processing device, programmable logic controller, network, and information processing method

A network comprising a ring topology, the network comprising:

• a plurality of slave devices that constitutes the network;
• a master device that manages the plurality of slave devices;
• and
• an information processing device that is communicatively connected to the master device,
• wherein the plurality of slave devices comprises a first slave device serving as a starting point and a terminal point of the ring topology, and a plurality of second slave devices which are connected between a first output port and a second output port of the first slave device and constitute the ring topology,
• the master device detects a configuration of the network on the basis of communication with the plurality of slave devices, is able to invalidate the second output port and an output port of the second slave device which is paired with the second output port, specifies an incorrect wiring path between the first output port and the second output port on the basis of a configuration of the network detected when the second output port and the output port of the second slave device which is paired with the second output port are valid, and a configuration of the network detected when the second output port and the output port of the second slave device which is paired with the second output port are invalidated, and outputs information indicating the specified incorrect wiring path to the information processing device, and
• the information processing device displays the incorrect wiring path.

An information processing method in a master device that manages a plurality of slave devices constituting a network comprising a ring topology, the plurality of slave devices comprising a first slave device serving as a starting point and a terminal point of the ring topology, and a plurality of second slave devices which are connected between a first output port and a second output port of the first slave device and constitute the ring topology, the information processing method comprising:

• a step of causing the master device to detect a configuration of the network on the basis of communication with the plurality of slave devices;
• a step of causing the master device to invalidate the second output port and an output port of the second slave device which is paired with the second output port;
• a step of causing the master device to specify an incorrect wiring path between the first output port and the second output port on the basis of a configuration of the network detected when the second output port and the output port of the second slave device which is paired with the second output port are valid, and a configuration of the network detected when the second output port and the output port of the second slave device which is paired with the second output port are invalidated;
• and
• a step of causing the master device to output information indicating the specified incorrect wiring path to an information processing device outside the master device.