WAGO SYSTEM 750 User Manual page 44

44 Function Description
Active Power
Register 32, bit 0
Register 37 (D-CTR)
Process value
Scaling factor PI
Equation
Measured value
Active Energy
Register 32, bit 0
Register 37 (D-CTR)
Register 35*
Process value
Scaling factor PI
Equation
Measured value
* Register 35: Setting in the register defines the scaling factor PI for energy values
D. User Scaling ON, Measurement with Current Transformer 500:1 A
(1A Variants) and 500:5 A (5A Variants)
In this example, the D-CTR is divided into two parts: D-CTR1 is programmed in
the I/O module and taken into account with the process value, the other one
D-CTR 2 must be taken into account externally, in the high-level PLC, when
calculating the measured value:
500:1 A => D-CTR = 500 - D-CTR1 = 50, D-CTR2 = 10
500:5 A => D-CTR = 100 - D-CTR1 = 50, D-CTR2 = 2
Due to the high internal resolution of the current measurement in the I/O module,
the process values are available with mA resolution. The resolution and data type
of other measured values must be observed, so that the measured values do not
exceed the range limits (e.g. for the measured power values).
Current
Register 32, bit 0
Register 37 (D-CTR1) 0x0032 (50)
Process value
Scaling factor PI
Equation
Measured value
Note: Resolution of the current values in 10mA steps
750-493 3-Phase Power Measurement Module
750-493
0
0x0001 (1)
0x03D2 (978)
0.1 W / LSB
Measured value = Process value x Scaling factor PI
x D-CTR
48900 W
750-493
0
0x0001 (1)
1
0x22ED (8941)
0.01 Wh / LSB
Measured value = Process value x Scaling factor PI
x D-CTR
44705 Wh
750-493
1
0xA6AF (42671)
0.001 A / LSB
Measured value = Process value x Scaling factor PI
x D-CTR2
426.71 A
WAGO-I/O-SYSTEM 750
750-493/000-001
0
0x0001 (1)
0x0776 (1910)
0.5 W / LSB
95500 W
750-493/000-001
0
0x0001 (1)
3
0 x 1126 (4390)
5 Wh / LSB
2195000 Wh
750-493/000-001
1
0x0032 (50)
0x2103 (8451)
0.005 A / LSB
84.51 A
Version 1.2.0
Manual