Beckhoff EL3783, Документация

Страница: 129 / 188

Commissioning
EL3783 129 Version: 1.1
Summary: an array variable have to be provided which is reachable via ADS. This can be a PLC variable of
a POU or a defined array variable by the system manager or alternatively the ADS server of the terminals/
boxes device is just activated. This is then detected by Scope2.
5.5 Process data
Data flow
The amplitude values are measured with 16-bit resolution and provided as oversampling packets in the
process image for cyclic transmission.
Fig. 169: Process data flow EL3783
Data processing
The data processing is done simultaneously for all channels in the EL3783 with 16-bit conversion in the
ADC.
Scaling related to the respective (constant) measuring range:
Output value presentation
Voltage
MBE = 737,2575 V (~= 130% * 400V * Wurzel(2)) --> 22,5 mV / digit
Current
5 A range: MBE = 9,207527 (~= 130% * 5A * root(2)) --> 281µA / digit
1 A range: MBE = 1,8415054 (~= 130% * 1A * root(2)) --> 56,2µA / digit
1. Vendor calibration (0x80p0:0B [ } 139])
Activation: CoE 0x80p0:0B
X
1
= (X
ADC
- Offset
Vendor
) * Gain
Vendor
2. User calibration (0x80p0:0A [
}
139])
Activation: CoE 0x80n0:0A
X
2
= (X
1
- Offset
User
) * Gain
User
3. Limit value evaluation (0x80p0:13 [ } 139], 0x80p0:14 [ } 139])
Display in the status word [
}
135] of the channel
If the value exceeds or falls below these values, which can be entered in the indices 0x80p0:13 [
}
139] and
0x80p0:14 [
}
139] , then the bits in the indices 0x60p0:03 [
}
140] and 0x60p0:05 [
}
140] are set accordingly
(see example below).
The entry
0x80p0:07 [
}
139] serves to activate the limit value monitoring.
Output limit n (2-bit):
• 0: not active