OSx Station Control2-16 SIMATIC PCS 7 OSx 4.1.2 Operator
2.4 New_Primary Command
With only one OSx station, use the New_Primary command if the station has
lost its role information in the database for some reason.
For multiple-station systems, use the
New_Primary command to assign a
station to be primary. This command is only selectable if the station has no
active primary in its database, which can happen if the station loses
communications with the primary (the p rimary goes inactive). This can also
occur if either the address or the name for the primary are incorrect, or if
two separate stations have been accidentally designated as primary.
Compare the
Primary option under the Role_Change command on page 2-10.
The software ensures that these commands are mutually exclusive except
for one situation: the primary has failed and any other stations on the
system are not out_of_service. If you select an inactive station with the
normal role, both
New_Primary and Role_Change are available. This allows
you to take an inactive station out_of_service prior to removing it from the
system, or to run diagnostics.
If an alarm occurs in the con troller when there is no active primary on the
system, the alarm icon and the alarm summary line do not flash. However,
the system writes the alarm to the alarm log. The operator needs to check
the alarm log for new alarms after a role change involving the primary.
Choose an active station to become the new primary. You can only designate
an inactive station to become the new primary if there are no active stations
on the network.
When you use the
New_Primary command to designate a station as the
primary, the system may log a message like the one shown below. You can
safely ignore this message.
error 249 in ./timechg primary_time_changed ::
primary_name failed
If you select the command New_Primary from Network Setup, but decide not
to confirm the command, the system dismisses Network Setup when you
select
No to the Are you sure? prompt. You must reselect Network Setup in
order to continue configuring.
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