West Control Solutions CALogix - Manual (Page 26)

6. To add segments click on ramp/soak/step.
7. Enter quantity of segments required then press OK.
8.
Click and drag segment points on the profile chart area to draw the required profile.
9. Click to open data for each segment in segment property menu.
10. Adjust values for any parameters that require modification. (see section on segment parameters).
11. If you require to add additional segments (ramp/soak/step), call programs, event inputs, event outputs or loops,
see notes below.
12. Once the profile is created click on programmer menu then click on write program data.
13. The program is now written to the controller.
PROGRAM SEGMENT TYPES
Ramps
During a ramp segment the setpoint will change at a user defined rate until a target setpoint is reached.
The ramp rate entered is set as process units per hour or minute, refer to section on program properties to configure.
If the ramp rate is set too high, setpoint may become much higher (or lower, if cooling) than process value. In this case, the
holdback band function will hold the moving setpoint when the process value falls out-with the number of units set in the
holdback band. Once the process value increases to fall within the band value, the moving setpoint will resume ramping at
the specified rate.
Soaks
During a soak cycle the setpoint will be held constant for a user defined period of time.
Click soak time parameter value box and time is displayed as hh:mm:ss.
Enter soak time required then click on parameter name, the soak time displayed is then displayed as total number of
seconds.
At the end of the soak period an event output can be triggered see notes on Event outputs below.
Step
A step is an instantaneous change in setpoint. Please note that it can take a process value some time to reach target
setpoint after a step function. If a soak function is preceded by a step function, the soak period commences immediately
after the setpoint has changed and not when the process value reaches setpoint, this can result in the soak period
appearing to be shorter than expected.
At the end of the soak period an event output can be triggered, see notes on Event outputs below.
Event outputs
SP2 and SP3 output state can be changed at various points of the program using event outputs.
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