| 摘要 |
<p>A device monitoring unit obtains, through respective digital communication routes, a combination of a digital setting value for an analog output value to an analog communication route in a field device, a digital value of an AD converting device in an input/output unit, and one of the digital setting values stored in a memory of the input/output unit, to check the status of the communication through the analog communication route based on the values obtained.</p> |
