ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
6226B_GE
11
Process Data Input Words IN[0] and IN[1]
The measured values and diagnostic messages (diagnostic codes) are transmitted to the controller
board or computer using the two process data input words. The contents of the words vary according
to the command.
IN[0] and IN[1] for Commands 0x00
hex
to 6000
hex
Figure 7
Process data input words
IN[0]
The output word OUT[0], which contains the command code, is mirrored in the input word IN[0]. This
confirms that the command has been executed correctly. If the command was not executed correctly,
the error bit is set in bit 15 of the input word IN[0].
The error bit is set if one of the following reasons (see page 29):
–
There is no valid configuration for the channel scanned
–
There was an invalid parameter during configuration
–
A reserved bit was set
The command is only mirrored if it has been executed completely. That means, for example, that the
5x00
hex
command is only mirrored after the value has been read and not after reconfiguration.
I N [ 0 ]
I N [ 1 ]
M S B
L S B
0
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
M i r r o r i n g o f t h e
c o m m a n d c o d e
1 5
E r r o r b i t
M S B
L S B
0
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
R e s u l t
1 5
6 2 2 6 A 0 0 8
0 0 0 0 0 0 0 0
b i n
