| 摘要 |
PURPOSE:To attain prompt trouble diagnosis and to improve serviceability by providing a pair of station data memories having the same address and making one of which selectable. CONSTITUTION:The first station data memory 4 and the second station data memory 5 have one and the same address and one of these memories can be selected by the turning on/off of a switch 10. The prescribed station data are registered in the memory 4, and office data for the management variable from station to station are registered in the memory 5. If any trouble occurs in the office data of the memory 5, the memory 4 is selected by switching of the switch 10 to conduct the operating test by the reference station data. |
