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3.7.7.
Analog input process value
Address
Format
Single-
Multi-
node
node
1596
572
16 bit
1860
836
16 bit
1867
843
16 bit
The parameter shows the process value of analog input A1 or A2 or A3.
min...max:
0.0...100.0
3.8.
Measuring load current
The Advanced Power Controller is able to measure the
current input from the controlled load, whether single-phase
or three-phase. The current input of a two-phase load can
also be measured.
The absolute current input value read is processed to ob-
tain an RMS current value useful for controlling the applica-
tion.
The RMS current value can be read in the variable Ld.A
of the individual module (each module corresponds to a
single-phase load).
For three-phase loads, which use 3 modules (M = line L1,
E1 = line L2, E2 = line L3), the average of the Ld.A variables
of the individual modules is taken and stored in the variable
Ld.A.t.
Input measurement accuracy is better than 1% in start
modes ZC, BF and HSC.
In PA mode the accuracy is better than 3% with a conduc-
tion angle >90° and better than 10% for smaller conduction
angles.
The circulating current in the load is acquired with a 0.2 ms
sampling time.
If diagnostics detects a fault condition on the load, the red
ER LED will flash in synch with the yellow O1, O2 or O3
LED for the module in question.
The default value of the H.tA maximum limit or ammeter
full-scale depends on the controller model:
GPC-OP
Acronym
menu
04.01.01
In.A1
Global
04.01.02
In.A2
Global
04.01.03
In.A3
Global
81901A "MSW_GPC-40/600A"_03-2021_ENG_page 21
GF_eXpress menu
Description
MainMenu → Global → Status → In.A1
MainMenu → Global → Status → In.A1
MainMenu → Global → Status → In.A1
GPC model
GPC 40
GPC 60
GPC 100
GPC 150
GPC 200
GPC 250
GPC 300
GPC 400
GPC 500
GPC 600
External CT
The following diagrams show the processing sequences for
the initial current value.
Float
R
s.p.
(####.#)
Float
R
s.p.
(####.#)
Float
R
s.p.
(####.#)
Rated current
40 A
60 A
120.0
100 A
200.0
150 A
300.0
200 A
400.0
250 A
500.0
300 A
600.0
400 A
800.0
500 A
1000.0
600 A
1200.0
r.tA = 200
1000.0
H.tA
80.0
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