Delta AH500 Manual page 131

Ch a pt er 5 Tem per at ur e M eas ur em ent Mo d u l e A H 04 PT / AH 0 8 PT G
b. Interrupt service routine
The procedure below explains how to trigger an interrupt service routine in a CPU module.

The interrupt service routines are I40~I251.
7. PID control
a. KP/KI/KD
Proportional action: The operation amount acts proportionally to the error. When a
Heater: The setting value is 1000 (100°C), and K
temperature and the operation amount is shown below.
O pe ra tio n a mou nt
He ate r
No (No detection)
No
No interrupt
temperature is lower than a proportional band, the operation amount is
100%. When a temperature is within a proportional band, the operation
amount decreases proportionally to the error. When the setting value is
the same as the present value, the operation amount is 0%.
(Error=Setting value–Present value)
1 00 %
0 %
Proportional
9 0℃
Channel
detection
Alarm/Warning
Enabling
physical range
detection
Yes
Enabling
interrupts
Yes
Selecting interrupt
numbers
is 100 (10°C). The relation between the
P
Te mpe ra tur e
band
1 00℃
5 - 9