OPERATING PROCEDURESMEMORY USAGE EXAMPLE4 - 8 I-E96-624A®MEMORY USAGE EXAMPLEIn this example, a pair of interfaces in one-way mode has thefollowing mix of points in their configuration:500 digital points (S3 of FC131 = 0)200 analog points (S3 of FC131 = 1)50 stations (S3 of FC131 = 2)Distribution of 750 total points on the remote loop is among 20modules residing in 10 different PCUs. There are five OISs onthe local loop. Each OIS receives all of the points.Memory Usage in the Local PPTThe points are coming to the local from the remote, therefore,Table 4-3 applies. The calculations are:500 digital points x 16 bytes/point = 8,000 bytes200 analog points x 30 bytes/point = 6,000 bytes50 station points x 76 bytes/point = 3,800 bytesEach OIS receives all 750 points:5 OIS x 750 points x 6 bytes/point = 22,500 bytesTotal memory used in the local PPT = 40,300 bytesMemory Usage in the Remote PPTThese points are to be sent to the local, therefore, Table 4-4applies. The calculations are:500 digital points x 18 bytes/point = 9,000 bytes200 analog points x 22 bytes/point = 4,400 bytes50 station points x 70 bytes/point = 3,500 bytes20 modules x 10 bytes/module = 200 bytes10 PCUs x 16 bytes/PCU = 160 bytesTotal memory used in the remote PPT = 17,260 bytesTable 4-4. Memory Usage in Sending CommunicationPoint Type Memory Bytes RequiredDigital 18Analog 22Station 70Remote Control Memory(RCM) 22Remote Manual Set Constant (RMSC) 26Device Driver 22NOTE: Add 16 bytes for each PCU that sources Exception Reports. Add 10 bytes for each modulethat sources Exception Reports.
