Siemens SIMATIC PCS 7 OSx, Руководство оператора

Страница: 34 / 232

OSx Station Basics
1-12
SIMATIC PCS 7 OSx 4.1.2 Operator
PCS 7 OSx Stations (continued)
In a multiple-station system, a supervisory or operator station can assume
different roles. These roles are summarized below.
•
PRIMARY_ROLE — The station that has the primary role coordinates
system functions and maintains the reference copy of the database for
the system. Only one OSx station can be assigned the primary role at a
given time.
•
BACKUP_ROLE — When the failover circuit is in place, the station
that has the backup role automatically assumes the role of primary if
the primary fails. Only one supervisory station can be assigned the
backup role at a given time. An operator station cannot have the
backup role.
•
SYSADMIN — Use the sysadmin role for selected modifications and/or
deletions of system configurations. Only one supervisory station can be
assigned the sysadmin role at a given time. An operator station cannot
have the sysadmin role.
•
OUT_OF_SERV — Set an OSx station to the out_of_service role before
you shut down the station for maintenance or to run diagnostic
routines. Once you have set a station to out_of_service, you must
reboot it to return it to the normal role.
• NORMAL_ROLE — An OSx station’s standard operational role is
normal if you have not assigned it the primary, backup, or sysadmin
role.