model 2704 controller installation and operation handbook - Soliton

2704 Controller Programmer Operation
6.2. WHAT IS SETPOINT PROGRAMMING ?
Many applications need to vary the process value over time. Such applications need a
controller which varies a setpoint as a function of time. The 2704 controller will program up
to three separate profiles. These may be temperature, pressure, light level, humidity, etc.,
depending on the application, and are referred to as Profiled Setpoints (PSPs). A setpoint
program containing three profile setpoints is shown in Figure 6-1.
The Program is divided into a flexible number of Segments - each being a single time
duration, - and containing details for each profiled setpoint. The total number of segments
available is 100 per program with a maximum of 500.
A controller containing functionality to control profile setpoints against time is referred to as
a Programmer. The 2704 programmer works on a single timebase for all programs.
Program
PV
Segment 1
Time
Segment 1
Target
Segment
Profile
Setpoint1
Profile
Setpoint 2
Profile
Setpoint 3
Start (Run)
1h 2h 3h 4h 5h 6h 7h 8h Time
1
2
16 X Digital Events
Figure 6-1: A Setpoint Program
The profiled setpoints may be used as either control loop setpoints or independent
parameters for retransmission or use in derived calculations.
The 2704 may store up to 20 programs as standard, with up to 50 if purchased.
Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 6-3