Commissioning and Diagnostics
5-5
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
Examples of assignment
1. The 8 channels of a BM 143-DESINA are to be parameterized as 5DIs +
3DOs. The functional inputs are parameterized as diagnostics inputs.
Channel
7
Channel
6
Channel
5
Channel
4
channel
3
Channel
2
Channel
1
Channel
0
DI DI DO DI DO DI DO DI
The input/output assignment in the process image is thus:
76 54 3210 Bit
Byte 0 ND7 ND6 0 ND4 ND2 ND0
Byte 1
FI7
(D)
FI6
(D)
FI5
(D)
FI4
(D)
FI3
(D)
FI2
(D)
FI1
(D)
FI0
(D)
PII:
00
Byte 0 ND5 ND3 ND1
Byte 1
PIO:
000000
000
0
0
0
0
FEn (D): Diagnostics input n
The arrows indicate the permanent relationship between signal and diagnostics
input.
The following applies in the example:
Diagnosis for channel 0 (DI) is in bit 0 of byte 1 of the PII
Diagnosis for channel 1 (DO) is in bit 1 of byte 1 of the PII
Diagnosis for channel 2 (DI) is in bit 2 of byte 1 of the PII
.
.
.
This assignment has to be taken into account when the application is programmed.
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