Delta DVP-PLC, Applications Manual

Page: 461 / 586

8 Application Instructions API 100-149
DVP-PLC Application Manual
8-59
Remarks:
1. Setting of
S
3
:
Device No. Function Range Explanation
Sampling time (T
S
)
(unit: 100ms)
1 ~ 200
(unit: 100ms)
If T
S
is less than a scan time, PID
instruction will be executed for a
scan time. If T
S
= 0, PID instruction
will not be enabled. The minimum T
S
must be greater than a scan time.
b0 =0 means
o
C
b0 =1 means
o
F
When the value exceeds the upper
bound, use upper bound.
b1=0 means
without fileter
function
b1=1 means with
filter function
When without filter function, PV =
currently measured value. When with
filter function, PV = (currently
measured value + previous PV)/2
b2=1 Slow heating environment
b3=1 General heating environment
b4=1 Fast heating environment
+1
b0: temperature unit
b1: filter function
b2 ~ b5: heating
environnment
b6 ~ b15: reserved
b5=1 High-speed heating environment
+2
~
+6
Parameters for system use only. Do not use them.
2. Control Diagram:
+
e
FTC
PV
MV
Fuzzy
Controller
Temperature
Sensor
SV
3. Notes and suggestion:
It is recommended that the sampling time be set to 2 times more than the sampling time of the temperature
sensor for better temperature control.
bit2 ~ bit5 of
S
3
+1 are for the control speed. If the user does not set up the parameter, FTC will automatically
activate “general heating environment”. When the user finds that the control is too slow to reach SV, select “slow