| 摘要 |
PROBLEM TO BE SOLVED: To obtain an alarm information collecting system for obtaining correct and detailed alarm information. SOLUTION: An alarm information collecting package transmits a chip select (c) for selecting an alarm table 41 and devices 32-3n. A decoding part 43 decodes the chip select (c) and generates an alarm table chip select (k) and a device chip select (j). A reading object judging part 50 judges whether an alarm reading object is the alarm table 41 or the devices 32-3n. When the alarm table 41 is selected, information of the table 41 is read by permitting buffers 51-53 to be through and the buffers 55-57 to be high impedance. When the devices 32-3n are selected, the tri-state buffers 51-53 and 55-57 execute an operation of reversed contents so that information from the selected devices 43-4n is read.
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