Beckhoff EL3413-0000, Documentation

Page: 138 / 200

Commissioning
EL34x3 138 Version: 4.4
Redundant checking of the mains frequency for system control is recommended.
The EL34x3 terminals are power measurement terminals. The mains frequency is measured and
displayed, but it should not be used as the sole value to control systems. In particular, step changes
in the mains frequency can influence the frequency measurement and produce implausible values.
Held frequency
Indices 46 to 48, "Held frequency", indicate the last frequency before an error occurs (Undervoltage, No zero
crossing).
5.5.2.3 PM Inputs Channel Auxiliary
STATUS
The TxPDO Toggle of this channel can be read in here
Index
Indicates which parameter the “Value” is currently measuring.
Channel
Indicates the channel on which measurement is currently taking place.
Value
There are several parameters behind the Value. If the value 0 is entered in “Channel”, the following values
can be read in.
• Neutral conductor current
• Sum of the energy (phase 1-3)
• Frequency
• Sum of the negative energy (phase 1-3)
• Sum of the active power (phase 1-3)
• Sum of the reactive power (phase 1-3)
• Sum of the apparent power (phase 1-3)
• Temperature at the ADC
If the value 1, 2 or 3 is entered in the channel, the following values of the respective phase 1, 2 or 3 can be
read in.
• RMS value of the harmonic of the current
• Ratio of the harmonic to the fundamental of the current
• RMS value of the harmonic of the voltage
• Ratio of the harmonic to the fundamental of the voltage
If the value 11, 12 or 13 is entered in the channel, the following values of the respective phase 1, 2 or 3 can
be read in.
• the apparent power
• the reactive power
• the energy
• the power factor λ
• the frequency
• the negative energy
• the angle α of the respective phase to phase L1