Lenze E84DGFCP - Manual (Page 70)

Communication manual 8400 motec PROFIBUS
Monitoring
Short-time interruption of PROFIBUS communication
70
L
EDS84DMOTPBUS EN 3.0 - 11/2011
10.2 Short-time interruption of PROFIBUS communication
[10-1] Sequence for short-time interruption of communication
The master detects the communication fault and only after a few microseconds it transfers
the slave to the WAIT_PRM state of the DP state machine (see fig. [10-1] ).
Only after the state chain of the DP state machine ending in the "Data_Exchange" state
(DATA_EXCH) has been passed through, the watchdog monitoring time calculated for the
slave (in milliseconds) continues to run.
Additional monitoring for the data exchange
An additional monitoring function for data exchange is available under code
C13881 . This
monitoring function already becomes active when the "Data_Exchange" state is exited
and the parameterised time (0 ... 65535 ms) has expired. The monitoring function then
triggers the response parameterised under C13880/1 .
2133PFB006
POWER ON
WAIT_PRM
WAIT_CFG
DATA_EXCH
Slave_Diag
Get_Cfg Set_Slave_Add
Slave_Diag
Chk_Cfg, not o.k.
Set_Prm, not o.k.
Chk_Cfg, o.k.
Slave_Diag
Set_Prm
Get_Cfg

Note!
The watchdog monitoring time does not continue to run when the slave does
not reach the "Data_Exchange" state due to repeated communication errors
(e.g. caused by loose contact).

Note!
Observe the following condition for the time setting:
Monitoring time for data exchange (
C13881 )
≤
watchdog monitoring time of
PROFIBUS ( C13882/1 ).