| 摘要 |
In a safety signal processing system, a DMA controller is embedded inside a communication controller of a numerical controller, and dedicated memories 1 and 2 are provided in a CPU 1 and a CPU 2. Every time of performing communication with an I/O unit 1 or an I/O unit 2, the communication controller performs DMA transfer to the dedicated memory 1 or 2 of the corresponding CPU 1 or 2, and the transfer destination can be changed by a configuration register inside the communication controller. A transfer route uses a dedicated bus, and thus, transfer can be carried out without arbitration or queuing.
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