When you reactivate a DP slave with the SFC 12 it is configured and assigned parame-
ters by the designated DP master (as with the return of a failed station). This activation is
completed when the slave is able to transfer user data.
Activating a DP slaves does not start the program error OB 85, even if its inputs or out-
puts belong to the system-side process image to be updated. An entry in the diagnostic
buffer is also not made.
Activating a DP slave does not start the slave failure OB 86, and the operating system
also does not make an entry in the diagnostic buffer.
If you attempt to use the SFC 12 to activate a slave, who has been deactivated and is
physically separated from the DP bus, a supervision time of 10sec expires. After this
monitoring period has expired, the SFC returns the error message 80A2h. The slave
remains deactivated. If the slave is reconnected to the DP bus at a later time, it must be
reactivated with the SFC 12.
Activating a DP slave may be time-consuming. Therefore, if you wish to
cancel a current activation job, start the SFC 12 again with the same
value for LADDR and MODE = 2. Repeat the call of the SFC 12 until suc-
cessful cancellation of the activation is indicated by RET_VAL = 0.
If you wish to activate DP slaves which take part in the cross communication, we recom-
mend that you first activate the transmitters and then the receivers (listeners).
At a restart the slaves are activated automatically. After the CPU start-up, the CPU cycli-
cally attempts to contact all configured and not deactivated slaves that are either not
present or not responding.
The startup OB 100 does not support the call of the SFC 12.
Parameter Declaration Data type Memory block Description
REQ INPUT BOOL I, Q, M, D, L,
constant
Level-triggered control parameter
REQ = 1: execute activation or deactivation
MODE INPUT BYTE I, Q, M, D, L,
constant
Job ID
Possible values:
0: request information on whether the addressed
DP slave is activated or deactivated.
1: activate the DP slave
2: deactivate the DP slave
LAADR INPUT WORD I, Q, M, D, L,
constant
Any logical address of the DP slave
Activating DP slaves
CPU startup
Parameters
VIPA SPEED7
Integrated Standard
System Functions > SFC 12 - D_ACT_DP - DP-Activating and Deactivating of DP slaves
HB00 | OPL_SP7 | Operation list | en | 18-30 655
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