IDEC MicroSmart Pentra - Manual (Page 106)

C ONFIGURING PID M ODULE USING W IND LDR
F C5A MicroSmart PID Module User’s Manual FC9Y-B1283 6-41
(23) Control Register+91: Program Control Mode Start Type
Select the program control mode start type from the following:
PV Start
When the program control is started, the time is advanced until the set point (SP) becomes
equal to the process variable (PV), and then the program control starts.
PVR Start
When “Continue program control (Repeat)” is selected as the program end action, the time is
advanced until the set point (SP) becomes equal to the process variable (PV) at which
program control is terminated, and then the next program control starts.
SP Start
When the program control is started, the program control starts from the set point (SP) that is
configured as “Set Point (SP) when Program Control Starts.”
Examples for the PV start, PVR start and SP start actions are described using the following program pattern.
PV Start Action [Process variable (PV) is 25°C]
Set Point (SP)
100°C
150°C
60 min
50°C
Step Number 0 1 2 3 4
Time
60 min 60 min 30
min
30
min
When the program control is started, the time will be
advanced (shown in dotted line) until the set point (SP)
becomes equal to 25°C of the process variable (PV),
and then the program control will start from this point.
Program Control Run
25°C
100°C
150°C
50°C
0 1 2 3 4
Time
Set Point (SP)
Step Number
15 min
45
min
60 min 60 min 30
min
30
min