| 摘要 |
PURPOSE:To distinguishably record each device operation by adding a code indicating a master station sending an operation signal to the operation signal when the optional master station records the operation of local devices in a supervisory control unit. CONSTITUTION:When operation signals from optional master stations 1a, 1b are transmitted each other between these master stations 1a, 1b and an optional master station 1a detects and records the operation of local devices in a supervisory control unit consisting of plural local stations 2a-2n and plural master stations 1a-1b each of which is provided with at least a data processing device and a printing device, the existence of the operation signals from the master stations 1a, 1b to operating devices is discriminated and a code indicating the master station 1a sending the operation signal is added to the operation signal. Consequently self-operation on the local side, automatic operation or operation through another master station 1b can be discriminated at the time of recording the operation of local devices. |
