16
•
750-563 [2 AO 0/4-20mA / 6-18V DC 16 Bit]
Function
Description
WAGO-I/O-SYSTEM
750
I/O
Modules
2.1.1.8 Function Description
The conversion algorithm takes into account all calculation and evaluation
steps of the process data up to the analog output value. The individual steps
will be explained in this chapter. The figure below provides a graphic
overview of the stepwise processing of the input value.
PAOUT
DAC
Y
1
Y
2
Y
3
Y
DAC
X
IN
Overrange
Underrange
DATA-
Format
DAC-
Format
Casting
Step 2
Step 3
Step 4
Step 5
Step 1
Manufacturer
calibration
User
calibration
User
scaling
Fig. 2.1.1-5: Conversion algorithm
g056204e
2.1.1.8.1 Step 1 – Reading Out X
IN
Process Data
X
IN
is transmitted to the module with the process data communication. The 16
bit-wide value depends on the data format. The data format is determined by
bit 3 and bit 6 in register 32.
The following data formats are possible:
Bit width
Description
Minimum value
Maximum value
16 bits
Integer without leading sign 0
65535
16 bits
Integer with leading sign
-32768
+32767
15 bits
Integer with leading sign bit -32767
(leading sign bit = 1)
+32767
(leading sign bit = 0)
