| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an encoder communication circuit suitable for a control apparatus, in an encoder and the control apparatus which perform transmission and reception of serial signals of a balanced line driver output system to/from each other. <P>SOLUTION: When an encoder 1 and a control apparatus 6 are mutually in a reception waiting state, namely both of them are in a transmission and reception stopped state, the encoder 1, in which the reception waiting state as a communication protocol is made at a logic H level, outputs first a logic H from an Out 1 terminal of an MPU 31 and outputs a logic L from an Out 2 terminal by processing operation of the MPU 31, and then both of the encoder 1 and the control apparatus 6 come into a normal communication state while the Out 1 terminal and the Out 2 terminal of the MPU 31 continue the state of the logic H and the state of the logic L, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
