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	SB1	CB1
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