Beckhoff EM7004, Documentation

Page: 15 / 130

Product overview
EM7004 15 Version: 2.0
2.4.1 Analog process data
In the delivery state the process data are shown in two's complement form (-1
dez
corresponds to 0xFFFF).
The feature object 0x8020:02 [
}
97] (channel 1), 0x8030:02 [
}
97] (channel 2), 0x8040:02 [
}
97] (channel
3), 0x8050:02 [
}
97] (channel 4) can be used to select other presentation types (e.g. magnitude sign format,
absolute value).
Output value Output voltage
hexadecimal decimal
0x8001 -32769 -10 V
0xC001 -16383 -5 V
0x0000 0 0 V
0x3FFF +16383 +5 V
0x7FFF +32767 +10 V
2.4.2 Process data equations
Calculation
The process data, which are transferred to the Bus Terminal, are calculated based on the following
equations:
Y
H
= X x A
K
+ B
K
Output value after manufacturer calibration (the feature object user scaling
[
0x8020:01 [
}
97] (channel 1), 0x8030:01 [
}
97] (channel 2), 0x8040:01
[ } 97] (channel 3), 0x8050:01 [ } 97] (channel 4) is inactive]
Y
A
= Y
H
x A
W
x 2
-16
+ B
W
Output value following user scaling