FISCHER DE43, Operating Manual

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4 | Start-up FISCHER Mess- und Regeltechnik GmbH
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Error
0x83 Code
1 2 Byte
Byte Field name Size Value range
1 Function Code (error) 1 byte 0x83
2 Error code 1 byte Code s. table Error codes [
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4.3.5 Function code 0x04: Read Input Register
This Function Code is used to read the input register. The maximum possible
number of registers that can be addressed in one message is 125.
Request The request contains the address of the first register that is to be read and the
number of registers that need to be read. The addressing of the register starts
with 0; the numbering of the registers starts with 1.
0x04 MSB LSB MSB LSB
5 1 2 3 4 Byte
Byte Field name Size Value range
1 Function Code 1 byte 0x04
2.3 Start Address 2 bytes 0x0000 to 0xFFFF
4.5 Number of registers 2 bytes 0x0001 to 0x007D (1…125)
The DE43 Transmitter has 3 Input Registers.
Reg.No. Address Data type Description Unit Contents
1 0x0000 Integer Measured value channel
1 PA Measured
value
2 0x0001 Integer Measured value channel
2 PA Measured
value
3 0x0002 Integer Temperature measured
value °C Measured
value
Response The response contains two bytes for each read register; therefore the number of
bytes is twice of the number of registers.
0x04 2N MSB
1 2 3 Byte
...
4
LSB MSB LSB
Register 1 Register N
Byte Field name Size Value range
1 Function Code 1 byte 0x04
2 Number of bytes 2 bytes 2N
3.4 Content Register N x 2 Byte 16 Bit value
Error
0x84 Code
1 2 Byte
Byte Size Value range
1 Function Code (error) 1 byte 0x84
2 Error code 1 byte Code s. table Error codes [
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