Irinos Measurement System
Two dynamic measurements simultaneously
Two dynamic measurements can be executed simultaneously. These are distinquished by the opcodes:
-Dynamic measurement 1: opcDDM1 (0x50) and opcRDM1 (0x60)
-Dynamic measurement 2: opcDDM2 (0x51) und opcRDM2 (0x61)
If two time-triggered dynamic measurements are executed simultaneously, the sum of the sample-rates is limited to 5.000 measurement values / s. Examples for valid sample-rates are:
oTime-triggered dynamic measurement 1 with a sample period of 0,3ms (=3.333,33 values/s) and time-triggered dynamic measurement 2 with a sample period of 0,75ms (=1.333,33 values/s).
Sum: 4.666,66 updates/s.
oTime-triggered dynamic measurement 1 and 2, each with a sample period of 0,5ms (=2.000 values/s).
Sum: 4.000 updates/s
If a position-triggered and a time-triggered dynamic measurement are executed simultaneously, the shortest sample period allowed for the time-triggered measurement is 1ms (=1.000 values/s).
In case both dynamic measurements are not running longer than 60 seconds, the shortest sample period allowed for the time-triggered measurement is 0,25ms (=4.000 values/s).
Two position-triggered dynamic measurements can be executed simultaneously.
Sample period of the time-triggered dynamic measurement
The sample period of the time-triggered dynamic measurement must be a multiple of the sample-period of all Irinos-Boxes involved. All Irinos-Boxes currently available support a sample period of 0,05ms = 50µs. Examples for valid sample-periods are:
sample period |
Samples/s |
|---|---|
0,1 ms |
10.000 |
0,15 ms |
6.666,666 |
0,2 ms |
5.000 |
0,25 ms |
4.000 |
0.4 ms |
2.500 |
0.5 ms |
2.000 |
1 ms |
1.000 |
2 ms |
500 |
4 ms |
250 |
10 ms |
100 |
Number of measurement channels vs. sample rate
All sample periods are independent of the number of channels. It does not matter whether 1, 5 or 17 measurement channels are used for a dynamic measurement. The only limitation is the maximum number of measurement channels (32).
Memory size / maximum number of measurement values
Each dynamic measurement has an internal buffer, which allows storing 100.000 measurement values / channel. If this buffer is full, the dynamic measurement is automatically stopped.
If measurement values are read by the MscDll while a dynamic measurement is active, these are removed from the buffer and more than 100.000 measurement values per channel can be stored. Since the speed of reading the values depends on various factors, no maximum value can be guaranteed.
10 channel lists
A maximum of 10 different channel lists are available inside the Irinos-System. Each dynamic measurement can use any of these channel lists.
2 Trigger configurations
A maximum of two triggers can be configured. Each dynamic measurement can use any of these triggers. It is also possible to use the same trigger-configuration for both dynamic measurements. In this case, they are started and stopped together using the opcodes opcAT (0x31) and opcIT (0x32).
Configuration during dynamic measurement
A copy of the assigned channel list and trigger configuration is made at the beginning of a dynamic measurement. If a channel list or a trigger configuration is changed while a dynamic measurement is active, this has no effect on the dynamic measurement.
