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5.2 MODBUS TCP
The following tables show some reading examples in MODBUS TCP.
Values contained both in Query and Response messages are in hex format.
CURRENT VALUE READING
Query example: 0100000000060103000E000A
Example Byte Description
01
-
Transaction ID
00
High
00
Low
Protocol ID
00
High
00
Low
06
-
6 data bytes
01
-
Unit ID
03
-
Function code
00
High
Starting register
0E
Low
00
High
10 words to be read
0A
Low
Response example: 01000000000314000009990000099F000009900000001900000998
Example Byte Description
01
-
Transaction ID
00
High
00
Low
Protocol ID
00
High
00
Low
16
-
22 data bytes
01
-
Unit ID
03
-
Function code
14
-
20 reading 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
MODBUS RTU/ASCII, TCP
89
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