Reading Command Examples - Chauvin Arnoux ULYS FLEX Modbus Notice De Fonctionnement

5. READING COMMAND EXAMPLES

In this chapter, some reading command examples are described.
These tables refer to a master-slave communication in MODBUS RTU.
Values contained both in Query and Response messages are in hex format.
CURRENT VALUE READING
Query example: 0103000E000A0EA4
Example Byte Description
01 - Slave address
03 - Function code
00 High
Starting register
0E Low
00 High
10 words to be read
0A Low
0E High
CRC
A4 Low
Response example: 010314000009990000099F000009900000001900000998C070
Example Byte Description
01
- Slave address
03 - Function code
14 - 20 data bytes
00 High
00 Low
2457 mA phase 1 current (A1)
09 High
99 Low
00 High
00
Low
2463 mA phase 2 current (A2)
09 High
9F Low
00 High
00 Low
2448 mA phase 3 current (A3)
09 High
90 Low
00 High
00 Low
25 mA neutral current (AN)
00 High
19 Low
00 High
00 Low
2456 mA system current (A∑)
09
High
98 Low
C0 High
CRC
70 Low
62 MODBUS RTU/ASCII