8.7 Offline buffer
In order to calculate the buffer time for MindConnect Nano or MindConnect IoT2040 you can
use the following formula:
MindConnect Nano data buffer is 500 MB. When the buffer is at full capacity, the new incoming
data will overwrite the oldest data.
The following example shows the buffer time for a MindConnect Nano with 500 MB data buffer:
In this case, 120 bytes is the memory needed for one data point.
8.8 Read performance MindConnect Elements
All MindConnect Elements have a clear limitation on soft limits(unmonitored number of data
points and data connections). The only fixed limit is 1050 data points. Within the soft limits, you
can configure data connections and data points without reaching the limits. For 250 datapoints
read per second, the upload bandwidth should be at least 0.5 MB/s.
The following describes how to proceed if you want to exceed these limits.
Tested MindConnect limits
MindConnect Nano
Max mount of data points can be configured (Fix) 1050
Data points OPC UA / S7 / Modbus TCP 250
(read per second)
Connections to data providers 30
String data points 10
Data points - Modbus RTU RS485 / RS422 - 9,6 kBd 20
Data points - Modbus RTU RS485 / RS422 - 19,2 kBd 35
Data points - Modbus RTU RS485 / RS422 - >= 38,4 kBd 80
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