Process Image; Table 21: Process Image - WAGO 750-585/040-000 Manual

WAGO I/O SYSTEM 750 XTR
750-585/040-000 2AO 0-20mA Ex i XTR
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4

Process Image

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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.
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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.
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The analog output module 750-585/040-000 transmits 16-bit measured values
and 8 optional status bits per channel.
The digitalized output value is transmitted in a data word (16 bits) as output byte
0 (low) and output byte 1 (high) via the process image of the fieldbus
coupler/controller.
The output current ranging from 0 ... 20 mA is scaled on the numerical values
ranging from 0x0000 to 0x7FFF.
This value is represented with a 12 bit resolution on bit B3 ... B14. The 3 least
significant bits (B0 ... B2) are not parsed.

Table 21: Process Image

Output current
0 ... 20 mA
0.0
2.5
5.0
7.5
10.0
12.5
15.0
17.5
20.0
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Numercial value
Binary
Output value
'0000.0000.0000.0000'
'0001.0000.0000.0000'
'0010.0000.0000.0000'
'0011.0000.0000.0000'
'0100.0000.0000.0000'
'0101.0000.0000.0000'
'0110.0000.0000.0000'
'0111.0000.0000.0000'
'0111.1111.1111.1111'
Process Image
Hex. Dec.
0x0000 0
0x1000 4096
0x2000 8192
0x3000 12288
0x4000 16384
0x5000 20480
0x6000 24576
0x7000 28672
0x7FFF 32767
33
Status byte
hex.
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
Manual
Version 1.1.0