Siemens SIMATIC HMI OP3, Equipment Manual

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12-8
Operator Panel OP3
Edition 11/99
You then transfer the S7 CPU system time to OP3. The FC6 uses the OP3
requirement in the interface area to set the OP clock.
FC6 parameters:
Parameter Address Type Description
DBTDOP DB51 BLOCK_DB This is the interface area.
Set_OPTime DB51.DBX0.2 BOOL The first word of DB51 contains the
status and control bits which display
the OP3 status. The OP3 uses bit 2 to
request synchronization of date and
time.
Setting bit 2 of the interface area enters the current system time in the Time
and Date data mailbox. The OP3 reads out the values and displays them in
screens that have been configured accordingly.
FC6 listing:
Address Declaration Name Type Initial value Comment
0.0 in DBTDOP BLOCK_
DB Number of
the interface
area
out
2.0 in_out SET_
OPTIME BOOL Function
trigger
0.0 temp DAT_TIME DATE_
AND_
TIME PLC time
storage
8.0 temp ret_val INT
Block: FC6 CLK PLC>OP3
Block to synchronize the OP clock with the PLC clock
Call in OB1:
CALL “CLK_PLC>OP3” // FC6 call
DBTDOP :=DB51 // DB51 = interface area in OP3
SET_OPTIME :=DB51.DBX0.2 // DB51.DBX0.2 = OP3 requests date/
// time (once after OP3 restart,
// then every 15 minutes)
Network: 1 Function trigger
UN #SET_OPTIME // as long as SET_OPTIME = 0
BEB // do not edit block
Reading the
S7 system time
Communication