Specifications

16 – Configuring Schedules

362 R400

Considerations When Adding a Schedule

The Scheduler runs once per minute to check if any scheduled controls should be

performed. Controls are performed sequentially. Therefore, if a large number of

schedules are configured for the same time, the last control requests might be

delayed by several tens of seconds. However, these requests will always be

performed before performing controls scheduled at a later time. It is

recommended that you schedule a large number of schedules over a short period

of time rather than all at the same time, in order to reduce system loading.

Selecting a Schedule

All schedule modifications are made on the Point Control Schedule.

You can type information directly into the fields under Schedule Maintenance,

or you can click an existing schedule in the display to copy the details into the

Schedule Maintenance fields before amending them. When the information is

correct, click Insert if it is a new schedule, or Update to change the schedule you

selected.

Adding a Schedule

Use the Point Control Schedule display to add a new schedule as follows:

Under Schedule Maintenance, enter the Date, Time (HH:MM), Point ID,

Parameter (choose from the list), Target and Type of schedule (choose

from the list.)

For example, to schedule the control of the OP parameter of point FIC123 to

20.0 at 10 AM every day starting from today (12 February 1997) enter:

Date: 12-Feb-97; Time: 10:00; point ID: FIC123; point

parameter: OP; Target: 20.0; Action: DAILY

Alternatively, a similar existing schedule can be copied to the Schedule

Maintenance fields by clicking an existing schedule. The schedule can then

be modified to suit.

When you have added all the schedule details, click Insert to add the

schedule.

Note • You cannot enter more than one schedule with the same point, date, and

time. If you need to control more than one parameter, for example to set a

point to manual before setting its value, enter the schedules for each

parameter in sequence, a minute apart.

plscpcg.book Page 362 Monday, May 28, 2001 10:11 AM