| 摘要 |
PURPOSE:To leave the error in operation to a part of unit, by performing the check of response signal at master and slave stations and suitably coping with the control response of error. CONSTITUTION:A control signal S1 output from an operating table 1 is transmitted via a master station 2 and a transmission line 3, to a slave station 8. This slave station 8 checks the code of transmission error as to the signal S1, and if no error, the signal S1 is given to a detection circuit 9 and a unit 5. The unit 5 responds to the reception of the signal S1 and required information is inserted to a display signal S2 and given to the slave station 8, and the slave station 8 sets a flag L2 to ''1'' when it receives the signal S2 and others are transmitted to the transmission line 3. Further, the master station 2 checks the signal 2 and when the flag L2 is at ''1'', the content of the data D is displayed on the panel 7. Further, the flag L2 is at ''0'' in the circuit 6, it is regarded as the malfunction of the unit 5. That is, the check of the response signal is made at the master and slave stations to suitably cope with the error control response and the error in operation is kept in a part of the unit. |
