149
CHAPTER 8 FUNCTIONS
8
8.
3 T
e
mperat
ure Cont
rol
M
ode
8.3.3
Control method
The following control methods can be used with the settings of proportional band (P), integral time (I), and derivative
time (D).
• Two-position control (
• P control (
• PI control (
• PD control (
• PID control (
For P control and PD control, the manual reset function is activated. (
(1) Two-position control
Two-position control is a control method that uses 0% manipulated value (MV) and 100% manipulated value
(MV). Turning on and off the manipulated value (MV) repeatedly, the temperature process value comes close to
the set value (SV), then is kept constant.
By the setting in CH
Adjustment sensitivity (dead band) setting (address: 111H, 141H, 171H, 1A1H) the chattering of
transistor output under two-position control can be prevented. Set a dead band toward the set value (SV) in CH
Adjustment sensitivity (dead band) setting (address: 111H, 141H, 171H, 1A1H). (
(a) Standard control
The module operates as follows outside the range of CH
Adjustment sensitivity (dead band) setting (address:
111H, 141H, 171H, 1A1H).
Condition
Transistor output status
The temperature process value (PV) is below the lower limit of the
adjustment sensitivity (dead band).
ON
The temperature process value (PV) is above the upper limit of the
adjustment sensitivity (dead band).
OFF
Standard
Heating-cooling
Temperature
process value (PV)
Time
Adjustment sensitivity
(dead band)
Transistor
output
Set value (SV)
OFF
ON
Summary of Contents for NZ2GF2B-60TCRT4
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