Structure Of The Interrupt Status - Siemens S7-300 Installation Manual

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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 transfer memory.
7 6 5 4 3
Byte y
0 0
Code for device-related diagnostics
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
Example on byte y+2
CPU
1. Address area
2. Address area
etc.
Figure 11-9 Structure of the interrupt status
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
2 1 0 Bit No.
Length of the device-related diagnostics incl. byte y
(max. 20 bytes)
01H: Code for diagnostics interrupt
02H: Code for process interrupt
3 2 1 0 Bit No.
Slot No.
2
4...35 = No. of the configured address area
00 = No additional information
01 = Incoming diagnostics
10 = Outgoing diagnostics
11 = Outgoing diagnostics,
Diagnostics or interrupt data
= 02H
= 04H
= 05H
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= CPU
of the intermediate memory
on diagnostic status
(there is at least 1 error)
Only for
diagnostic
interrupt
but there are still
disturbances
11-27