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NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.3 | NRG PROFINET User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
6.3
Measurements
Voltage RMS
The last reading of the rms voltage is recorded. The value of the reading is in 1V steps hence a value of 50 means
50V, a value of 700 means 700V. If a fault occurs in the system such that it is not possible to measure the voltage, the
reading is 0. The reading is updated every half cycle based on the average of the last 16 half cycles. If the Ref terminal
is not connected this register reads the on-state voltage of the RG..N when the output is ON.
Current RMS
The last reading of the RMS current is recorded. This reading is in steps of 0.01A hence a value of 50 means 0.5A and
a value of 1747 means 17.47A. If a fault occurs in the system such that it is not possible to measure the current, this
value is 0. This reading is updated every half cycle but is based on the average of the last 16 half cycles.
Frequency RMS
The last reading of the frequency is recorded. The value is in steps of 1 Hz. If a fault occurs in the system such that it is
not possible to measure the frequency, this register gives a value of 0. This value Is updated every half cycle but is
based on the averaged value of the last 15 cycles.
Hold Current
The highest rms current detected in the last number of cycles which is set in the Hold Current Period setting. This value
is in steps of 0.01A hence a value of 50 means 0.5A and a value of 1747 means 17.47A. The Hold current is not available
with the Advanced Full Cycle firing mode in which case it will read a value of 0.
Apparent Power
The apparent power reading is recorded in VA. This reading is in steps of 1VA and hence a value of 567 would mean
567VA. This value is updated every half cycle and is a multiplication of the Voltage RMS value and Current RMS value
determined in the last half cycle. This reading requires the ‘Ref’ terminal to be connected, otherwise the value will be
constantly 0.
Real Power
The real power reading is recorded in W. This reading is in steps of 1W and hence a value of 567 would mean 567W.
This value is updated every half cycle and is a multiplication of the Voltage RMS value and Current RMS value
determined in the last half cycle. This read
ing requires the ‘Ref’ terminal to be connected, otherwise the value will be
constantly 0.
Note that for resistive loads with power factor = 1, the real power and the apparent power will be the same.
Energy
The initial value of this register at power-up is the last reading recording before switch OFF of the NRG controller. In
case of a new device this value starts from 0. This reading starts counting from the initial value at power-up the kWh
consumed during this power up. This reading is updated in steps of 1 kWh hence a value of 1034 would mean
1034kWh.
SSR Running Hours
This reading records the accumulated time in hours that the output of the RG..N was switched ON. The value is
updated every half cycle. The initial reading at power-up is the last reading recorded before switch OFF of the NRG
controller. In case of a new device this value starts from 0. This reading starts from the initial value at power-up the
running hours during this power up. The reading is updated in steps of 1hour hence a value of 1034 would mean 1034h
that the output was ON during its lifetime. In the event that the counter reaches its maximum value, the counter shall
roll back to 0 and start counting up again.
Load Running Hours
This reading records the accumulated time in hours that the output of the RG..N was switched ON. The value of this
register is updated every half cycle. The initial value of this register at power-up is the last reading recording before
switch OFF of the NRG control. This reading is updated in steps of 1 hour hence a value of 1034 would mean 1034h
that the output was ON during its lifetime. In case of a new SSR this value starts from 0. This reading can be reset in
case of a load or SSR replacement via the Load Running Hours reset setting. A ‘Store Permanently’ command shall
be executed after modifying the value.
