Robot operation command system, tablet terminal and control method of tablet terminal

An operation command system for robots, comprising:

• multiple controllers each having identification information and configured to control a robot;
• a base configured to establish a wireless connection or a wired connection with one of the multiple controllers;
• and
• a tablet terminal configured to perform wireless connection to one of the multiple controllers, wherein,
• the base includes:
• a holder configured to removably hold the tablet terminal;
• and
• a connector configured to be wire-connected to the tablet terminal,
• the tablet terminal includes:
• an operation signal generating unit configured to generate an operation signal for causing the controller to operate the robot;
• and
• an operation restricting unit configured to prevent the robot from being operated by the operation signal when the identification information of the controller to which the base holding the tablet terminal is connected does not coincide with the identification information of the controller to which the tablet terminal is connected in a state where the tablet terminal is able to transmit the operation signal.