WAGO-I/O-SYSTEM 750 XTR
Process Image
33
750-557/040-000 4AO +/-10V DC /XTR
Manual
Version 1.3.0
4
Process Image
Mapping of process data in the process image of fieldbus systems
The representation of the process data of some I/O modules or their variations in
the process image depends on the fieldbus coupler/controller used. Please take
this information from the section
“I/O Modules” included in the description
concerning the process image of the corresponding coupler/controller.
For the I/O module 750-557/040-000, the numerical values ranging from
0x8001
… 0x7FFF are scaled on the output current ranging from −10 V … +10 V.
Table 21: Process Image
Output Value
±
10 V
Numerical Value
Status Byte
Hex.
Binary
Output Value
Hex.
Dec.
−10
’1000.0000.0000.0001’ 0x8001
−32767
0x00
−8
’1001.1001.1001.1010’ 0x999A
−26214
0x00
−6
’1011.0011.0011.0100’ 0xB334
−19660
0x00
−4
’1100.1100.1100.1101’ 0xCCCD −13107
0x00
−2
’1110.0110.0110.0111’ 0xE667
−6553
0x00
0
’0000.0000.0000.0000’ 0x0000
0
0x00
2
’0001.1001.1001.1001’ 0x1999
6553
0x00
4
’0011.0011.0011.0011’ 0x3333
13107
0x00
6
’0010.1100.1100.1100’ 0x4CCC
19660
0x00
8
’0110.0110.0110.0110’ 0x6666
26214
0x00
10
’0111.1111.1111.1111’ 0x7FFF
32767
0x00
No Status Byte to evaluate!
Some fieldbus systems can process the status information of process values
using by means of a status byte.
As the returned status byte of this I/O module is always zero, it will not be
parsed.
