TXP-CLC Course
OT
OT
Terminal bus
Terminal bus
AS
AS
Time synchronization throughout DCS
by using Industrial Ethernet
PU
PU
SU
SU
OT
OT
DS
DS
ES
ES
OT/DT
OT/DT
AS
AS
Plant bus
Plant bus
OT/ET
OT/ET
time transmitter
time transmitter
transm
transm
. clock
. clock
every
every
10sec
10sec
GPS/DCF
GPS/DCF
trans
trans
mitter
mitter
In TXP, a system-wide, uniform time is kept by a time transmitter, from which
time-tags are obtained for marking events. The time-of-day is distributed via the
time transmitter over the plant bus.
The time-of-day transmitter is used for time synchronization of the TXP
subsystems AS620, OM650, and DS670 and it transmits time-of-day messages
over the plant bus at intervals of 10 seconds which are received and evaluated
by the connected TXP participants.
The time-of-day transmitter is only implemented on the plant bus; time is
transferred to the participants connected to the terminal bus via the PU. The
time-of-day transmitter can be synchronized via other clocks or it can be used to
synchronize other clocks.
Time-of-day synchronization can also be implemented via one of the
communications processors in the AS620 subsystems (CP1430).
Training Center
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