| 摘要 |
PROBLEM TO BE SOLVED: To provide a system that does not read old data time sequentially in the case of writing reception data in an optional storage area among a plurality of temporary storage areas and collectively reading the storage area in which the latest reception data are written after finishing the writing. SOLUTION: The reception data received by communication equipment are alternately written in 1st and 2nd areas in a shared memory. When reception abnormality occurs, normal reception data about the data in which the abnormality occurs is read from the previously stored area, and the read normal reception data is stored as data received this time together with normally received reception data into an area of a storage object. Namely, when data from a device B is abnormal in the third communication cycle (to be stored in the 1st area) as illustrated, normal data (1) is read from the 2nd area where the normal data of the device B is stored in the second communication cycle and stored in the first area.
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