ZIEHL-ABEGG NETcon D-G-64NE, Operating Instructions Manual

Page: 15 / 27

6.4 Read data
Read Holding Register (3) / Read Input Register (4)
Request data
Frame Byte Value Description Remarks
Head 0 0x18 Meter Runs automatically continuously from
0x01...0xFF, e.g. 0x18
1 0x06 Length "6" for reading data
MODBUS 2 0xF7 Address Always 247
3 0x03 Command 3 means reading
4 0x00 Register Index (Hi) Register index (possible: 0 to 49), e.g.
H2
5 0x02 Register Index (Lo)
6 0x00 Register data (Hi) Counts the queried data (1 to 2)
7 0x01 Register data (Lo)
8 0x00 do not use
9 0x00 do not use
Received reply
Frame Byte Value Description Remarks
Head 0 0x18 Meter Runs automatically continuously from
0x01...0xFF, e.g. 0x18
1 0x05 Length "5" for reading data
MODBUS 2 0xF7 Address Always 247
3 0x03 Command 3 means reading
4 0x02 Data meter Data meter (number of bytes received)
5 0x00 Register data (Hi) Here: 2 data bytes received, e.g. 0xC8
(=200)
6 0xC8 Register data (Lo)
7 0x00 do not use
8 0x00 do not use
9 0x00 do not use
Operating Instructions NETcon D-G-64NE Communication
L-BAL-E273-GB 1631 Index 001 Part.-No.
15/27