Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 462)

8 Application Instructions API 100-149
DVP-PLC Application Manual 8-60
heating environment” to enhance the speed to reach SV. On the contrary, when the user finds that the control is
too fast or with too many fluctuations, select “fast heating environment” to slow down the control speed.
When bit2 ~ bit5 of S
3
+1 are all set as 1 or more than 1 environments are designated, FTC instruction will check
from bit2 to bit 5 in order and enable the function that has been set as 1. The parameter can be modified during
the control.
4. Example 1: control diagram
Fuzzy
Controller
FTC
SV
D10 D22
MV
Y0
D11 PV
+ e
PT Module
GPWM Program
Temperature
Sensor
Output D22 (MV) of FTC instruction is the input D22 of GPWM instruction, as the duty cycle of ajustable pulses.
D30 is the fixed cycle time of pulses. See below for the timing diagram of Y0 output.
D22
D30
Y0
Assume parameter settings: D10 = K1,500 (target temperature), D12 = K60 (sampling time: 6 secs.), D13 = K8
(bit3=1), D30 = K6,000 (=D12*100)
The example control program is indicated as:
M1002
MOV K1500 D10
TO K0 K2 K2 K1
FROM K0 K6 D11 K1
MOV K60 D12
MOV K8 D13
MOV K6000 D30
SET M1
M1
FTC D10 D11 D12 D22
GPWM D22 D30 Y0
M1013
FROM K0 K6 D11 K1
END