TOHO ELECTRONICS TTM200 - Manual (Page 77)

48-7009-E 5-7
5.3.2 ON/OFF control setting
When a measurement value (PV) being controlled reaches the target value (SV), the control output is turned
off. Then, the control output is turned on when the measurement value (PV) goes beyond the peak value,
approaches the target value (SV), and goes beyond it. This move is repeated at a particular position.
The adjustment sensitivity (sensitivity range), in this case, is defined as the difference between the point where
the control output turns off (measurement value) and point where the control output turns on.
★ Setting the ON/OFF control
The PID control is set as factory default.
As the ON/OFF control is preset at “1” of the bank function, the ON/OFF control can be set by changing
the setting in the bank setting screen of the control setting mode.
1) How to change the setting in the bank
For constant value run mode screen:
PV value (present value)
SV value (target value)
Hold MODE key pressed for 2 seconds.
Input 1 setting screen
Each set screen
Each setting mode
Press the ▲ key three times. Press it, however, twice for TTM-204.
Control setting mode
Press MODE key once.
S04-1 Bank setting mode
* Setting change to the ON/OFF control is conducted in the bank setting screen.
Changing “0” to “1” using the ▲ key results in the setting of the ON/OFF control.
Then, holding the MODE key pressed for 2 seconds, the screen moves back to the run
mode screen.
(In about 2 minutes, the screen automatically moves back to the operating mode screen.)
* The sensitivity range for the ON/OFF control is set at 1 °C at factory shipment.
* Setting the ON/OFF control results in displaying no items related to the PID control.
Continued to the next page
H
o
ld
MOD
E
k
ey
p
re
ss
ed
fo
r
2
se
co
n
d
s.
For program run mode screen:
PV value (present value)
SV value (PRoG)
Hold MODE key pressed for 2 seconds.
Setting mode is the same as that for Hereinafter,
to the input 1 setting screen similarly to that for
the constant value run mode