84 Process Image
WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
Manual
Version 1.2.0
The transformation ratio is set either with WAGO-I/O-
CHECK
or in registers
39 … 42. In the process, the divisor for the current transformer ratio (D-CTR) is
set in the registers. Corresponding to the examples above, these would be:
•
750-495/040-000 (1A): CTR = 1:45,
D-CTR = 45
=> registers
39 … 42
•
750-495/040-001 (5A): CTR = 1:40,
D-CTR = 40
=> registers
39 … 42
This yields the following calculation of the measured values for the current-
dependent variables:
Current
750-495/040-000
750-495/040-001
Register 32,
bits 12 … 15
1
1
Registers 39 … 42
(D-CTR)
0x002D (45)
0x0028 (40)
Process value
0x0005E250 (385616)
0x0003C9D1 (248273)
PI scaling factor
0.0001 A
0.0005 A
Formula
Measured value = process value × PI scaling factor
Measured value
current
38.562 A
124.137 A
Active power
750-495/040-000
750-495/040-001
Register 32,
bits 12 … 15
1
1
Registers 39 … 42
(D-CTR)
0x002D (45)
0x0028 (40)
Process value
0x000049B5 (18869)
0x0001C3F8 (115704)
PI scaling factor
0.01 W
0.05 W
Formula
Measured value = process value × PI scaling factor
Measured value for
power
188.69 W
5785.20 W
Active energy
750-495/040-000
750-495/040-001
Register 32,
bits 12 … 15
1
1
Registers 39 … 42
(D-CTR)
0x002D (45)
0x0028 (40)
Register 35*
)
2
4
Process value
0x00000D86 (3462)
0x00002CA3 (11427)
PI scaling factor
0.1 Wh
50 Wh
Formula
Measured value = process value × PI scaling factor
Measured value for
energy
346.2 Wh
571350 Wh
*)
Register 35: The setting in the register defines the PI scaling factor for energy values