1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

520 Recipe and Data LoggingNumber of RecordsUsing Queue 0 as an example, each record consumes:Record FieldMemory ConsumptionDate2 bytesTime2 bytesN7:11 2 bytesL14:0 4 bytesT4:5.ACC2 bytesI1:3.02 bytesB3:2 2 bytesIntegrity Check2 bytesTotal18 bytesIn this example, each record consumes 18 bytes. So if one queue wasconfigured, the maximum number of records that could be stored wouldbe 7281. The maximum number of records is calculated by:Maximum Number of Records = Data Log File Size/Record Size= 128K bytes/18 bytes= (128)(1024)/18= 7281 recordsExample Queue 5Queue 5 (Time = ✔, Delimiter = TAB)Time N7:11 I1:3.0 I1:2.1Record 0 20:00:00 TAB 2315 TAB 8190 TAB 4465Record 1 20:30:00 TAB 2400 TAB 8210 TAB 4375Record 2 21:00:00 TAB 2275 TAB 8150 TAB 4335Record 3 21:30:00 TAB 2380 TAB 8195 TAB 4360Record 4 22:00:00 TAB 2293 TAB 8390 TAB 4375Record 5 22:30:00 TAB 2301 TAB 8400 TAB 4405Record 6 23:00:00 TAB 2308 TAB 8100 TAB 4395String Length of RecordThe size of a record is limited so that the length of the maximumformatted string does not exceed 109 characters. The following table canbe used to determine the formatted string length.Publication 1766-RM001A-EN-P - October 2008