Chapter 4 Applications; Heat Only Control With Dwell Timer - Brainchild C21 User Manual

Chapter 4 Applications

Chapter 4 Applications

4 - 1 Heat Only Control with Dwell Timer

4 - 1 Heat Only Control with Dwell Timer
An oven is designed to dry the products at 150 C for 30 minutes and
then stay unpowered for another batch. A C91 equipped with
timer timer is used for this purpose. The system diagram is shown as
follows :
Set
SP1=150.0 SP1=150.0
SP2 =30.0 SP2 =30.0
OP1 OP2
PV SP1 SP2
2 1
Timer ( ALM ) Timer ( ALM )
To achieve this function set the following parameters in the setup To achieve this function set the following parameters in the setup
menu. menu.
INPT=K_TC INPT=K_TC
OUT1=REVR OUT1=REVR
O1FT=BPLS O1FT=BPLS
Auto-Tuning is performed at 150 C for a new oven. Auto-Tuning is performed at 150 C for a new oven.
51
4 5
C F
C
MAN AT
R
C91
10 9
OUT1
Oven
T/C
Heater
OFF
L L
UNIT= C UNIT= C
O1TY=RELY O1TY=RELY
OUT2=TIMR OUT2=TIMR
L L
UM0C911A
B
dwell dwell
Figure 4.1 Figure 4.1
Heat Control Heat Control
Example Example
Mains Mains
Supply Supply
ON
DP=1_DP DP=1_DP
CYC1=18.0 CYC1=18.0
O2FT=ON O2FT=ON