Structure Of The Interrupt Status For Cpu 31Xc - Siemens SIMATIC S7-300 Hardware And Installation Manual

Interrupt status
The interrupt status of module diagnostics provides details on a DP slave. The
maximum length of module diagnostics starting at byte y is 20 bytes.
The following figure describes the structure and content of the bytes for a
configured address area of intermediate memory.
7 6
Byte y
0 0
Code for device-related diagnosis
Byte y +1
7 6 5 4
Byte y +2
0 0 0 0 0 0
Byte y +3
Byte y +4
to
Byte y +7
.
.
.
Byte z
Figure 10-10

Structure of the interrupt status for CPU 31xC

As of byte y+4
The significance of the bytes following byte y+4 depends on byte y+1 (see previous
figure).
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
Testing functions, Diagnostics and Fault Elimination
5 4 3 2 1 0 Bit No.
Length of device-related diagnosis incl.
byte y (max. 20 bytes)
3 2 1 0 Bit No..
example on Byte y+2:
CPU
1. Address area
2. Address area
etc.
01 : Code for diagnostic
H
interrupt
Slot No:
2 = CPU
4...35 = No of configured
area of intermediate memory
00 = process interrupt
01 = incoming diagnosis
(there is at least one 1 error
10=outgoing diagnosis
11=reserved
Diagnostics or interrupt data
(see figure 10-11)
= 02
H
= 04
H
= 05
H
)
10-27