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Commissioning and Diagnostics
Signals (user data) and diagnostics data are mutually independent. The
diagnostics input merely shows the state of the sensor or actuator; there is no
defined effect on the signal. The necessary or desired reaction can only be derived
from the application.
The examples below illustrate the relationship between the individual signals and
the diagnostic inputs.
Bit assignment of the inputs
In the PI, inputs are assigned as shown in Figure 5-2.
Byte 0
Byte 1
Figure 5-2
Bit assignment of the outputs
In the PI, outputs are assigned as shown in Figure 5-3.
Byte 0
Byte 1
Figure 5-3
5-4
7
6
5
ND7
ND6
ND5
FI7
FI6
FI5
ND0 ... ND7:
Signal (user datum, digital)
channel 0 to channel 7
FI0 ... FI7:
Functional input (diagnostics datum)
channel 0 to channel 7
Each functional input can be parameterized
– as a diagnostics input or
– as an input with NC function.
Default: diagnostic input
Assignment of the inputs in the process image (PI)
7
6
5
ND7
ND6
ND5
0
0
0
ND0 ... ND7:
Signal (user datum, digital)
channel 0 to channel 7
Byte 1 is not used (= 0)
Assignment of the outputs in the process image (PI)
4
3
2
1
ND4 ND3
ND2
ND1
FI4
FI3
FI2
FI1
4
3
2
1
ND4 ND3
ND2
ND1
0
0
0
0
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
0
Bit
ND0
FI0
0
Bit
ND0
0
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