VIPA 238-2BC00 - Page 88

Chapter 3 Analog output modules Manual VIPA System 200V
3-4 HB97E - SM-AIO - Rev. 12/32
Please regard only the Siemens S7 format (two's complement) is supported
by the Siemens SIMATIC manager for decimal representation. When the
Siemens S5 format is used the decimal values are incorrectly represented.
Within the Siemens S5 format a value may be converted between decimal
and output value by means of the following formulas.
+/- 10V
Voltage Decimal Hex
-10V -16384 C000
-5V -8192 E000
0V 0 0
5V 8192 2000
10V 16384 4000
0...10V
Formulas for the calculation:
10
16384
U
Value ⋅=
,
16384
10
⋅= ValueU
U: voltage, Value: decimal value
Voltage Decimal Hex
0V 0 0000
5V 8192 2000
10V 16384 4000
1...5V
Formulas for the calculation:
10
16384
U
Value ⋅=
,
16384
10
⋅= ValueU
U: voltage, Value: decimal value
Voltage Decimal Hex
1V 0 0
3V 8192 2000
5V 16384 4000
4....20mA
Formulas for the calculation:
4
1
16384
−
⋅=
U
Value
,
1
16384
4
+⋅= ValueU
U: voltage, Value: decimal value
Current Decimal Hex
4mA 0 0
12mA 8192 2000
20mA 16384 4000
+/- 20mA
Formulas for the calculation:
16
4
16384
−
⋅=
I
Value
,
4
16384
16
+⋅= ValueI
I: current, Value: decimal value
Current Decimal Hex
-20mA -16384 C000
-10mA -8192 E000
0mA 0 0
10mA 8192 2000
20mA 16384 4000
0...20mA
Formulas for the calculation:
20
16384
I
Value ⋅=
,
16384
20
⋅= ValueI
I: current, Value: decimal value
Current Decimal Hex
0mA 0 0
10mA 8192 2000
20mA 16384 4000
Formulas for the calculation:
20
16384
I
Value ⋅=
,
16384
20
⋅= ValueI
I: current, Value: decimal value
Conversion within
the Siemens S5-
format