IDEC MicroSmart Pentra - Manual (Page 32)

PID M ODULE M AIN F UNCTIONS
FC5A MicroSmart PID Module User’s Manual FC9Y-B1283 4-9
Program Control
The program control allows you to define the set point (SP) that changes as the time progresses so that the
process variable (PV) can be controlled to match the set point (SP) changing as the time progresses. The set
point (SP) and time can be configured for each step. A maximum of 10 steps can be configured and performed.
The set point (SP) can be configured as shown in the following diagram.
The program control is suitable for applications, such as electric furnaces for ceramic industries or food
machineries.
Main functions of the program control are described as follows:
Program Pattern and Steps
1 program pattern consisting of 10 steps can be performed per channel.
Program Hold Function
Suspends the progression of the program control while the program control is running and performs the fixed
value control with the set point (SP) at the time that the program control is held.
Advance Next Function
Terminates the current step while the program control is running and proceeds to the start of the next step.
Advance Previous Function
Moves back the progression of the program control while the program control is running.
Wait Function
When a step ends during program control, if the deviation between the process variable (PV) and set point
(SP) is bigger than the wait value, the program control does not move to the next step. The program control
proceeds to the next step once the deviation between the process variable (PV) and set point (SP) becomes
smaller than the wait value.
Repeat Function
When the all steps are executed and the program control is terminated, the program control can be repeated
from Step 0 as many times as the repeat number configured.
Step
Temperature
Time