socomec DIRIS A40 - Reading of Electrical Values on 1 Words with HEX 700

MAN 06 033774 – technical_guide_ DIRIS_A40_A41_C.doc40/Z41 - B 18/27
4.2 - reading of electrical values on 1 word with HEX 700
DIRIS A JBUS/MODBUS address : 7
With current transformer ratio = CT =100/5 A and voltage transformer = VT =
1000/100 V AC
Reading of current phase 1 (address Hex. 700) :I1 = 100,7 A
Master request :
Slave
Function
Address
Address
Number of words
Number of words
CRC16
High-order
Low-order
High-order
Low-order
07
03
07
00
00
01
C429
DIRIS reply:
Slave
Function
Number of
Word 1
CRC16
bytes
07
03
02
13AC
055A
5036 mA
It is necessary to convert the answer in the following way:
multiply by CT ratio
5036 mA x 100/5 = 100 720 mA =100,72 A
Reading of phase to phase voltage U12 (address Hex. 704) : U12 = 1055 V AC
Master request :
Slave
Function
Address
Address
Number of words
Number of words
CRC16
High-order
Low-order
High-order
Low-order
07
03
07
04
00
01
C4D9
DIRIS reply:
Slave
Function
Number of
Word 1
CRC16
bytes
07
03
02
2938
2E06
10 552 V/100
It is necessary to convert the value in the following way:
multiply by VT ratio :
10 552 x 1000/100 = 105 520 V/100 = 1055,2 V AC