Patent ID: 11954054
Assignee: TOSHIBA CARRIER CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC G  H  F | IPC G  H

Claim 3:
4. A communication method comprising:
performing communication normally at a high baud rate via a communication line by a master unit and a plurality of slave units including a slave unit to which a termination resistance is set, and switching the high baud rate to a low baud rate by the master unit after communication between the master unit and the slave unit to which the termination resistance is set is disabled;
switching a communication rate to the low baud rate by a slave unit that is unable to communicate with the master unit due to the master unit switching the high baud rate to the low baud rate;
after the communication between the master unit and the slave unit to which the termination resistance is set is restored, transmitting, by the master unit, an instruction for switching the low baud rate to the high baud rate to the plurality of slave units, and switching setting of the master unit itself to the high baud rate;
switching the low baud rate to the high baud rate by the slave units that receive the instruction for switching the low baud rate to the high baud rate from the master unit; and
in each of the slave units including a resistance that can be connected to the communication line as the termination resistance, a memory that stores termination resistance setting information indicating whether each of the slave units is a target to which the termination resistance is to be set, and a switching circuit that electrically switches between connection and non-connection of the termination resistance to the communication line, switching between connection and non-connection of the resistance to the communication line by the switching circuit based on the termination resistance setting information stored in the memory.