Solartron Mobrey 7828, Technical Manual

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Modbus Communications 7828 Density Transmitter Technical Manual
D-14
78285000_AA
showing that the transducer is set to 32 bits register size. Thus, by reading the third byte
of the response, you can deduce the value of Register 48.
c) Send the following message (Read Register 47):
Slave
Address
Command Register
Address Checksum
nn 03 00 47
10
00 02 checksum
where nn is the transducer's slave address.
The transducer will respond with either:
Slave
Address
Command Data Bytes Checksum
nn 03 04 4 data bytes checksum
or:
Slave
Address
Command Data Bytes Checksum
nn 03 08 8 data bytes checksum
Examine the first four bytes of the data. If they are all 00, then the transducer is in Big
Endian mode; if they are all FF, then the mode is Little Endian.