Structure Of The Slave Diagnostics - Siemens SIMATIC ET 200S Manual

3.3.2

Structure of the slave diagnostics

Structure of the slave diagnostics
The figure below shows the structure of the IM151-1 BASIC slave diagnostics.
Figure 3-1
Note
With the IM151-1 BASIC, the length of the diagnostics frame varies between 6 and 43 bytes.
You can see the length of the last received diagnostic frame in:
RET_VAL des SFC 13.
IM151-1 BASIC interface module (6ES7151-1CA00-0AB0)
Manual, 07/2008, A5E01075925-02
Structure of the IM151 BASIC slave diagnostics
Error and system messages
3.3 Diagnostics with STEP 7
STEP 7
from the parameter
17