Process Image; Standard Data Format - WAGO I/O SYSTEM 750 Manual

12 • 750-585 [2 AO 0-20 mA EEx i]

Process Image

2.1.1.6 Process Image
The analog output module 750-585 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 coupler /
controller.
This value is represented with a 12 bit resolution on bit B3 ... B14.
The three least significant bits (B0 ... B2) are not parsed.
Some fieldbus systems can process the status information using by means of a
status byte.
As the returned status byte of this output module is always zero, it will not be
parsed.
2.1.1.6.1

Standard Data Format

For the standard module 750-585, the output current ranging from 0 mA to
20 mA is scaled on the numerical values ranging from 0x0000 to 0x7FFF
Process values of module 750-585
Output current
0 - 20 mA
0 0000 0000 0000 0000
2.5 0001 0000 0000 0000
5 0010 0000 0000 0000
7.5 0011 0000 0000 0000
10 0100 0000 0000 0000
12.5 0101 0000 0000 0000
15 0110 0000 0000 0000
17.5 0111 0000 0000 0000
20 0111 1111 1111 1111
numerical value
binary
Output value
Status-
byte
hex. dec.
hex.
00 00 0 00
10 00 4096 00
20 00 8192 00
30 00 12288 00
40 00 16384 00
50 00 20480 00
60 00 24576 00
70 00 28672 00
7F FF 32767 00
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I/O Modules