Siemens SIMATIC ET 200AL - Page 615

Setting and determining system diagnostics
4.2 Options for displaying system diagnostics
Diagnostics
30 Function Manual, 09/2016, A5E03735838-AD
4.2.2
Diagnostics information in STEP 7
4.2.2.1
Explanation of diagnostics symbols
Diagnostics symbols for modules and devices
When the online connection to a device is established in STEP 7, the diagnostics status of
the device and its lower-level components and, if applicable, the device operating mode are
also determined. The following table shows the possible symbols and their meaning.
Table 4- 2 Diagnostics symbols for modules and devices
Symbol
Meaning
The connection with a CPU is being established.
The CPU is not reachable at the set address.
The configured CPU and the CPU actually present are of incompatible types.
Example: An existing CPU 315-2 DP is incompatible with a configured CPU 1516-
3 PN/DP.
On establishment of the online connection to a protected CPU, the password dialog was
terminated without specification of the correct password.
No fault
Maintenance required
Maintenance demanded
Error
The module or device is deactivated.
The module or the device cannot be reached from the CPU (valid for modules and de-
vices below a CPU).
Diagnostics data is not available because the current online configuration data differ from
the offline configuration data.
The configured module or device and the module or device actually present are incom-
patible (valid for modules or devices under a CPU).
The configured module does not support display of the diagnostics status (valid for mod-
ules under a CPU).
The connection is established, but the module status has not yet been determined or is
unknown.
Hardware error in lower-level component: A hardware fault has occurred in at least one
lower-level hardware component (occurs as a separate symbol only in the project tree).