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"IB RT" Format
The measured value is represented in bits 14 to 0. An additional bit (bit 15) is available as a sign bit.
This format corresponds to the data format used on INTERBUS RT modules.
Diagnostic codes and error bits are not defined in this data format. An open circuit is indicated by the
positive final value 7FFF
Measured value representation in "IB RT" format (15 bits):
15
14
13
SB
SB
Sign bit
Significant Measured Values
Voltage Ranges
Input Data Word
(Two's Complement)
hex
dec
7FFF
32767
7FFE
32766
4000
16384
0001
1
0000
0
Input Data Word
(Two's Complement)
hex
dec
7FFF
32767
7FFE
32766
4000
16384
0001
1
0000
0
FFFF
-1
C000
-16384
8001
-32767
8000
-32768
6226B_GE
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
.
hex
12
11
10
9
0 V to 5 V
U
IN
V
≥ +4.999847
+4.999695
+2.5
+152.6 µV
0
±5 V
U
IN
V
≥ +4.999847
+4.999695
+2.5
+152.6 µV
0
-152.6 µV
-2.5
-4.999847
≤ -5.0
8
7
6
Analog value
0 V to 10 V
U
IN
V
≥ +9.999695
+9.999390
+5
+305.2 µV
0
±10 V
U
IN
V
≥ +9.999695
+9.999390
+5.0
+305.2 µV
0
-305.2 µV
-5.0
-9.999695
≤ -10.0
5
4
3
2
0 V to 25 V
U
IN
V
≥ +24.999237
≥ +49.998474
+24.998474
+49.996948
+12.5
+25.0
+762.9 µV
+1.5259 mV
0
±25 V
U
IN
V
≥ +24.999237
+24.998474
+12.5
+762.9 µV
0
-762.9 µV
-12.5
-24.999237
≤ -25.0
1
0
0 V to 50 V
U
IN
V
0
21
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