Device system, information processor, terminal device, and displaying method

An information processor comprising:

• a receiver configured to receive, from a terminal device, information representing an attentional device among devices included in a plant;
• a storage which stores relation information representing a relation of the devices;
• a generator configured to generate at least two relation diagrams, in which the attentional device and a relational device related to the attentional device are shown, based on information representing the attentional device received by the receiver and the relation information stored in the storage;
• and
• a transmitter configured to transmit, to the terminal device, the at least two relation diagrams generated by the generator.

A terminal device comprising:

• a designator configured to designate an attentional device among devices included in a plant;
• a transmitter configured to transmit, to an information processor, information representing the attentional device designated by the designator;
• a receiver configured to receive, from the information processor, at least two relation diagrams in which the attentional device and a relational device related to the attentional device are shown;
• and
• a display configured to display the at least two relation diagrams received by the receiver.

A displaying method comprising:

• designating, by a designator, an attentional device among devices included in a plant;
• generating, by a generator, at least two relation diagrams in which the attentional device designated by the designator and a relational device related to the attentional device are shown;
• and
• displaying, by a display, the at least two relation diagrams generated by the generator.