Loreme IPL 144V, Руководство по настройке

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TABLE OF CONTENTS
E 17
Note:
The processing time Tt is fixed. It depends neither on the speed nor on the transmission format. Consequently, for new
transmission parameters, all the times are going to change but for Tt. To set the
TIME OUT of the system, you just have
to calculate the answer time Trep of the dependent station according to the parameters of communication.
For a total phase reading, the time of cycle of the system is about 36 ms.
4.3) Energies reading:
Reading of 8 words, 16 bytes, of the address $A01E to $A025 (active consumed and generated, and reactive inductive
and capacitive energies)
- 8 bytes question frame
Tq = (8 x 10) / 9600 = 8.33 ms
- Silence Ts = (3.5 x 10) / 9600 = 3.64 ms
- Processing Tt = 6 ms
- Emission 1
st
byte Te1 = (1 x 10) / 9600 = 1.04 ms
- Answer time Trep = Ts + Tt + Te1 = 10.68 ms
- Answer frame (37 bytes) Tr = [(21 - 1) x 10] / 9600 = 20.83 ms
- Complete cycle Tcyc = Tq + Trep + Tr = 39.84 ms
4.4) Energies reset:
Reset of the active consumed and generated, and reactive inductive and capacitive energies by the writing of word
$55AA at the address $7000.
- question frame
Tq = (8 x 10) / 9600 = 8.33 ms
- silence Ts = (3.5 x 10) / 9600 = 3.64 ms
- processing Tt = 6 ms
- emission 1st byte Te1 = (1 x 10) / 9600 = 1.04 ms
- answer time Trep = Ts + Tt + Te1= 44.68 ms
- answer frame 8 bytes Tr = [(8 - 1) x 10] / 9600 = 7.29 ms
- complete cycle
Tcyc = Tq + Trep + Tr = 26.3ms
5) Frames structure:
5.1) Words reading:
Function code used: $03 or $04, address $A000 to $A05B
Question: length of frame 8 bytes.