137 • HRVS-DN Communication (ModBus Protocol)
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Trip_Pointer
117
373
Pointer for the 10 cyclic above arrays
Actual_Data_Group
151..170 407..426 Group of 20 actual parameters selected by
setting
parameters
#90..109
Example 1:
To read actual parameters 5,6,7 (I1,I2,I3 Actual Parameters, Addressed as 4.5 and 6) of HRVS-DN # 18 (its
Serial Link No. = 18) , the host computer should send following frame:
Another Possibility
(Modbus Plus users)
byte 1:
Serial Link No.
($12)
($12)
byte 2:
Function
($04)
($03)
byte
3:
Starting
Address
High
($00)
($01)
byte
4:
Starting
Address
Low
($04)
($04)
byte
5:
No.
of
Points
High
($00)
($00)
byte
6:
No.
of
Points
Low
($03)
($03)
byte 7: CRC_Low
($XX)
($XX)
byte 8: CRC_High
($XX)
($XX)
The HRVS-DN response, when Current = 400 % of FLA, and Voltage = 420V, is:
byte 1:
Serial Link No.
($12)
($12)
byte 2:
Function
($04)
($03)
byte
3:
Byte
Count
($06)
($06)
byte 4:
Data High, parameter 5
($01)
(400)
($01)
byte
5:
Data
Low,
parameter
5
($90)
($90)
byte 6:
Data High, parameter 6
($01)
(420)
($01)
byte
7:
Data
Low,
parameter
6
($A4)
($A4)
byte 8:
Data High, parameter 7
($01)
(410)
($01)
byte
9:
Data
Low,
parameter
7
($9A)
($9A)
byte 10: CRC_Low
($XX)
($XX)
byte
11:
CRC_High
($XX)
($XX)
Note:
$XX indicates Hexadecimal byte.
