| 摘要 |
When user configuration data recorded in a recording medium (500) is written into a PLC (100), the PLC (100) determines, in accordance with a combination table stored in the recording medium (500), if a combination of the user configuration data and firmware already stored in the PLC (100) is suitable. In addition, when firmware recorded in the recording medium (500) is written into the PLC (100), the PLC (100) determines, in accordance with the combination table stored in the recording medium (500), if a combination of the firmware and user configuration data already stored in the PLC (100) is suitable. |
