KM3702, KM3712 - Process image
The KM3702 and KM3712 terminal modules are represented in the process image with a maximum of 6 bytes of input data and 6 bytes of output data. These are organized as follows:
Format | Input data | Output data |
|---|---|---|
Byte | ||
Word | DataIN1 | DataOUT1 |
Byte | SB2 | CB2 |
Word | DataIN2 | DataOUT2 |
Key
SB n: Status byte for channel n
CB n: Control byte for channel n
DataIN n: Input data word channel n
DataOUT n: Output data word channel n
- The meaning of the control and status bytes is explained in Control and status bytes.
- In process data mode the analog values are transferred in output data words DataIN1 and DataIN2. Input data words DataOUT1 and DataOUT2 are not used.
Representation of the analog values
The analog input values are represented by the terminal modules as follows:
KM3702
Pressure | Decimal | Hexadecimal |
|---|---|---|
0 hPa | 0 | 0x0000 |
7500 hPa | 7500 | 0x1D4C |
KM3712
Pressure | Decimal | Hexadecimal |
|---|---|---|
-1000 hPa | -1000 | 0xFC18 |
0 hPa | 0 | 0x0000 |
+1000 hPa | +1000 | 0x03E8 |