40
Figure 5-3 example of feature change (with pattern 3 example)
5.2 control function
5.2.1 manual control
When the control mode setting unit BFM#1000 ~ BFM#1003 is set to 0, the corresponding channel of
MTC will perform manual control. The output will be output according to the manual output set value
(BFM#1016 ~ BFM#1019) according to the control cycle (BFM#917 ~ BFM#920).
5.2.2 ON/OFF control
When the control mode setting unit BFM#1000 ~ BFM#1003 is set to 1, the corresponding channel of
MTC will perform ON/OFF control. In the ON/OFF control, the control output is set as OFF when the
measured value is greater than the temperature set value, and ON when the measured value is less than
the temperature set value.
Setting the dead zone of ON/OFF control, namely the adjusting sensitivity (BFM#1024 ~ BFM#1027),
can prevent the output from repeatedly changing ON/OFF.
Figure 5-4 ON/OFF control
5.2.3 requires PID control
PID control is through setting each constant P (proportional coefficient) I (integral time) D (differential
time) can obtain the stable control effect. Set the MTC control mode setting unit (BFM#1000 ~ BFM#1003)
as 2 to make the corresponding channel work in the PID control mode, then set the PID parameters, and
then in the control start/stop setting unit (BFM#997) the corresponding channel position will be written 1,
at this time the corresponding channel of MTC will start PID control according to the parameters set.
5.2.4 self-setting function
Set the channel of MTC to work in PID mode, write 1 to the channel position of the self-tuning set value
