| 摘要 |
<p>PURPOSE:To obtain the processing circuit, for which it is unnecessary to reset count data in the case of recoverying the power failure of an AC power source, without generating interruption at a host processor each time a count signal is inputted by providing a local processor to transfer the count data through a shared memory and receiving feeding from a DC source independent of a power source to supply power to an applied device. CONSTITUTION:Based on an initial value transmitted from a host processor 2 to a shared memory 24, the count data stored in a memory 23 are initially set by a local processor 21 and based on the count signal inputted from an outside count signal generator (slave timer) 6, the count data stored in the memory 23 are transferred through the shared memory 24 to the host processor 2. Further, the power required for the operation of a count signal processing circuit (timer signal interface board) 20 is supplied from a power supply circuit (DC/DC converter) 29 receiving feeding from an outside DC source 30. Therefore, the count signal processing circuit 20 can be realized not to generate the interruption to the host processor 2 each time the count signal is inputted.</p> |
