Advertisement
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
"PIO" Format
The PIO format enables high-resolution representation of measured values in the 4 mA to 20 mA cur-
rent measuring range. In this format, an imaginary measuring range of 0 mA to 25 mA is divided into
16
2
quantization steps (65,536 steps). Thus, unipolar measured currents with a resolution of 0.38 µA/
LSB can be represented. Although this format is designed for the 4 mA to 20 mA range, signals bet-
ween 0 mA and 24 mA can be detected so the overrange limits and the open circuit threshold in the
higher-level control system are freely definable.
Measured value representation in "PIO" format (16 bits):
15
14
13
Example of parameterization using PIO format
Channel:
Filtering:
Format:
Measuring range: 4 mA to 20 mA (PIO format is only supported in this measuring range.)
Option 1:
1
Configuring channel 1
OUT[0]
4000
OUT[1]
004A
2
Reading the measured value
OUT[0]
0000
OUT[1]
0000
Option 2:
Configuring channel 1 and reading the measu-
red value
OUT[0]
5000
OUT[1]
004A
28
12
11
10
9
1
16-sample average
PIO
hex
hex
hex
hex
hex
hex
8
7
6
Analog value
Significant Measured Values
Input Data Word
(Two's Complement)
hex
F5C2
CCCD
6666
0A3D
0001
0000
5
4
3
2
dec
62914
+24.0
52429
+20.0
26214
+10.0
2621
+1.0
1
+0.3815 µA
0
+0
1
0
PIO
I
IN
mA
6226B_GE
Advertisement
