Diagnosing Faults With Step 5 (Station Diagnostics) - Siemens SIMATIC S5 ET 200U Manual

ET 200U(DP Standard): AddressAssignm.,Starting–Up, DiagnosingFaultsUsing COM ET 200

5.3.3 Diagnosing Faults with STEP 5 (Station Diagnostics)

General Remarks
With STEP 5 you can systematically localize and evaluate a fault:
on Diagnostics
Table 5-11 Diagnostics with STEP 5
Diagnostics overview
Diagnostics for parameter
assign. and addressability
Station status
Station diagnostics
Identifier–related diagnos-
tics (module diagnostics)
The diagnostics for parameter assignment and addressability and the diagnos-
tics overview are described in the "ET 200 Distributed I/O System"
Manual, as they are applied to all slave stations.
To avoid misunderstandings, the two diagnostics bytes of the diagnostics word
are referred to in this chapter as the "diagnostics address" and "diagnostics
address + 1". The load and transfer operations in this chapter refer to the de-
fault diagnostics address 252.
If more than one diagnostics message is displayed, the last message remains
on the screen.
Special Features
When using page addressing, the diagnostics word is located in the basic
of Requesting page. Before you request diagnostics as described in this chapter, you must
Diagnostics Using
first of all "switch over" to the basic page number.
Page Addressing
Example The P area is addressed via pages. The basic page number of the IM 308–B
interface module is "O" (PO). You want to request and evaluate diagnostics
overview. You have accepted the default diagnostics address 252.
L KB 0
T PY 255
L KY 127,n
T PW 252
L PW 252
L KH 0000
!=F
BEC BEC
JU FBx JU FB
5-32
Diagnostics
Records all stations which have diagnostics
data pending.
Records all stations which can be parameter-
ized and addressed.
Provides data on the status of the slave sta-
tions.
Provides general data on the status of the
slave stations.
Localizes the defective module in the
ET 200U slave station.
Page selection
0 age se ect o
Request diagnostics overview (n = 0, 1, 2 to 7) q g
,
Evaluate the diagnostics word l h di
F lt? Fault?
E l t th f lt i FB Evaluate the fault in FBx
...
( , , )
i d
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b