Siemens SIMATIC PCS 7 OSx, Руководство оператора

Страница: 155 / 232

Action Requests
7-3
SIMATIC PCS 7 OSx 4.1.2 Operator
7.2 Monitoring Action Requests
After the action requests are defined, and the system is placed in the
Operate state, the action request package begins monitoring each of the
trigger tags. Any time a trigger bit for a tag attribute changes state from 0
to 1, the OSx station screen displays the action request icon in the lower
righthand corner. ( Figure 7-1 ).
The icon has the following characteristics:
• It is yellow and contains the text Normal when the highest priority of
any unanswered action requests is normal. The icon flashes on all OSx
station monitors whose currently logged-in users have a process group
in common with the triggered request until someone acknowledges it.
• It is red and contains the text Urgent when the highest priority of any
unanswered action requests is urgent. It flashes on all OSx station
monitors whose currently logged-in users have a process group in
common with the triggered request until someone acknowledges it.
• The higher priority Urgent icon will always replace the Normal icon if
an urgent request has been triggered.
• The icon stops flashing on the OSx station monitor (all monitors in a
multi-station system) when someone selects it to display the Action
Request Summary.
• The icon disappears if the operating state changes from the Operate
state to the Offline state or if all action requests are answered.
General Guidelines