Beckhoff KM3701, Documentation

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Access from the user programm
KM3701, KM3702 and KM3712 27 Version: 2.0.0
6 Access from the user programm
6.1 KM3701 - Process image
The KM3701 terminal module is represented in the process image with a maximum of 3 bytes of input data
and 3 bytes of output data. These are organized as follows:
Format Input data Output data
Byte
SB [
}
28] CB [
}
28]
Word DataIN DataOUT
Key
SB: Status byte
CB: Control byte
DataIN: Input data word
DataOUT: Output data word
• The meaning of the control and status bytes is explained in Control and status bytes .
• In process data mode, the analog value is transferred in the input data word DataIN. The output data
word DataOUT is not used.
Representation of the analog values
The terminal module displays the analog input values as follows:
KM3701-0000
Differential pressure Decimal Hexadecimal
-100 hPa -1000 0xFC18
0 hPa 0 0x0000
+100 hPa +1000 0x03E8
KM3701-0340
Differential pressure Decimal Hexadecimal
-340 hPa -3400 0xF2B8
0 hPa 0 0x0000
+340 hPa +3400 0x0D48
6.2 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 [
}
28] CB1 [
}
28]
Word DataIN1 DataOUT1
Byte
SB2 [
}
29] CB2 [
}
29]
Word DataIN2 DataOUT2