7 Programming FCs (Functions) and FBs for S7 Ethernet CPs
A-216
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
How the Block Works
The following diagram shows a typical sequence of AG_CNTRL jobs in the user
program.
User program
(CPU cycle)
Ethernet CP
AG_CNTRL (status query)
Status connection ID1
1)
supply AG_CNTRL for status query:
ACT = 1; CMD=1
ID =1 (connection)
Status query for connection
1 is acknowledged
Legend:
1)
Parameter transfer DONE, ERROR, STATUS and RESULT1/2
Time
Time
An event is detected that makes it
useful to abort and reestablish a
connection.
AG_CNTRL (reset command)
supply AG_CNTRL for reset:
ACT = 1; CMD=2
ID =1 (connection)
Reset request active:
Reset ID (bit 15 in
RESULT1) is set
Acknowledgment of job
acceptance:
RESULT1: “connection
establishment triggered”
1)
Connection is terminated
and reinitialized:
Reset ID (bit 15 in
RESULT1) remains set
AG_CNTRL (status query)
Status connection ID1
1)
supply AG_CNTRL for status query:
ACT = 1; CMD=1
ID =1 (connection)
Status query is
acknowledged;
then the reset ID (bit 15 in
RESULT1) is cleared
Acknowledgment:
RESULT1: B095
H
“Reset was executed”
1)
Entry in diagnostic
buffer
The diagram shows how the connection status is initially queried and then, in a
second job, how the connection termination is triggered with the reset command.
FC10 AG_CNTRL - continued
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