Instructions

Detailed descriptions of I/O modules | Analogue input module UR20-8AI-I-PLC-INT
190 1432790000/03/02.2014Manual u-remote
MeasurementrangeUR20-8AI-I-PLC-INT
Measurementrange Current(I) Decimal(D) Hexadecimal Range Conversion
0 – 20mA
Siemens S7 format
23.52mA 32511
0x7EFF
Overloading
D = 27648 x I/20
I = D x 20/27648
20mA 27648
0x6C00
Nominal range10mA 13824
0x3600
0mA 0
0x0000
0 – 20mA
Siemens S5 format
23.52mA 19268
0x4B44
Overloading
D = 16384 x I / 20
I = D x 20 / 16384
20mA 16384
0x4000
Nominal range10mA 8192
0x2000
0mA 0
0x0000
4 – 20mA
Siemens S7 format
22.81mA 32511
0x7EFF
Overloading
D =27648 x(I – 4) / 16
I=D x16 / 27648 + 4
20mA 27648
0x6C00
Nominal range12mA 13824
0x3600
4mA 0
0x0000
1.19mA -4864
0xED00
Underloading
4 – 20mA
Siemens S5 format
22.82mA 19268
0x4B44
Overloading
D =27648 x(I – 4) / 16
I=D x 16 / 16384 + 4
20mA 16384
0x4000
Nominal range12mA 8192
0x2000
4mA 0
0x0000
0.8mA -3277
0xF333
Underloading
The following applies for all S7 ranges:
input value > overload range = 0x7FFF
input value < underload range = 0x8000
Additional status bits are set for S5.
DigitalmeasuredvaluerepresentationinSiemensS5format
Data bit 7 6 5 4 3 2 1 0
Byte 0 (high byte) 2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
Byte 1 (low byte) 2
4
2
3
2
2
2
1
2
0
A F O
A: 0 = not active
1 = active
F: 0 = no line break
1 = line break
O: 0 = 0 to 4095 units
1 = ±4096 units (overflow)
Representation in two's complement
2
12
= VZ in representation as amount and signs