Rosemount 3095FB - Reading and Writing 16 Bit Registers; Reading and Writing Bit Registers

Model 3095FB Multivariable Transmitter with Modbus Protocol
Modbus Protocol Guide
Page 19 of 79
2.6.2 Reading and Writing 16 Bit Registers
2.6.3 Reading and Writing Bit Registers
If the returned input quantity is not a multiple of eight bits, the remaining bits in the final
data byte will be padded with zeros (toward the high end of the byte). In this case all four of
the bits that were asked for were ON (0000 1111). The rest of the byte was padded with
zeros.
Function 04: Reading 16 Bit Register Data
Address Function Starting reg-
ister
# of registers Error check
Query 01 04 00 12 00 01 XXXX
Address Function Byte count Register data
bytes
Error check
Response 01 04 02 00 86 XXXX
Function 16: Writing 16 Bit Register Data
Address Function Starting
register
# of reg-
isters
byte
count
Register
data bytes
Error
check
Query 01 10 00 30 00 01 02 00 24 XXXX
Address Function Starting
register
# of reg-
isters
Error
check
Response 01 10 00 30 00 01 XXXX
Function 02: Reading Bit Registers
Address Function Starting reg-
ister
# of registers Error check
Query 01 02 00 3A 00 04 XXXX
Address Function Byte count Register data
bytes
Error check
Response0102010F XXXX