Diagnostics In Direct Communication; Diagnostic Address For The Recipient During Direct Communication; Event Detection Of The Cpus 41X As Recipient During Direct Communication - Siemens SIMATIC S7-400 Reference Manual

Structure of a CPU 41x
1.12.2

Diagnostics in Direct Communication

Diagnostic Addresses
In direct communication you assign a diagnostic address in the recipient:
S7-CPU as sender
Figure 1-18

Diagnostic Address for the Recipient During Direct Communication

Event Detection
Table 1-20 shows you how the CPU 41x as recipient detects interruptions in data
transfer.
Table 1-20 Event Detection of the CPUs 41x as Recipient During Direct Communication
Event
Bus interruption
(short circuit,
connector removed)
1-66
S7-CPU as recipient
PROFIBUS
Diagnostic address
During configuration you specify a
diagnostic address in the recipient that is
assigned to the sender.
By means of this diagnostic address the
recipient obtains information on the
status of the sender or a bus interruption
(see also Table 1-20).
What Happens in the Recipient
•
OB 86 is called with the message Station failure
(incoming event; diagnostic address of the recipient assigned
to the sender)
•
In the case of I/O access: OB 122
called (I/O access error)
Automation System S7-400 CPU Specifications
A5E00165965-01