Lenze EPM−T9XX Modular system - Manual (Page 275)

Diagnostics
Description
10
Networking via PROFIBUS−DP
10.6
10.6.1
L
10.6−1 EDSPM−TXXX−9.0−11/2009
10.6 Diagnostics
10.6.1 Description
10.6.2 Diagnostic data
Comprehensive diagnostic functions in PROFIBUS−DP ensure that errors can be
quickly located. The diagnostic data is transmitted to the master where it can be
evaluated.
The diagnostics in power section DP−V1 can also trigger alarms. An alarm consists
of an alarm message and a status message.
Diagnostic messages such as the "READY" and the "DataExchange" states are
stored internally in the slave. They are not transmitted to the master.
Every time the state changes from "READY" to "DataExchange" and vice versa,
the slave stores the diagnostic data in RAM in a Flash−ROM and writes the content
back into the RAM during every restart.
If the voltage falls below a specific limit value or in the event of voltage failure, a time
stamp is stored in EEPROM immediately.
l If the voltage is sufficient, a diagnostic message with time stamp is
transmitted to the master.
l In the event of voltage failure, a diagnostic message with time stamp is
generated from the EEPROM during the next restart and stored in the RAM
of the slave.
Internal diagnostic messages
Diagnostic message in the event
of voltage failure