8-15
IM 05P02D41-01EN
Control Functions
When the Heating Side is in PID Control and the Cooling Side is in ON/OFF Control:
The following shows the formula and operation example.
HOUT = ( OUT
–
–
50% ) × 2
2
DB
*: OUT: control output, HOUT: heating-side control output,
COUT: cooling-side control output, DB: dead band, and
HYSc: cooling-side hysteresis
COUT = OUT < ( 50%
–
–
)
OUT > ( 50% + + )
Other than these cases, maintain current state.
Output turns on when
Output turns off when
2
DB
2
HYSc
2
DB
2
HYSc
Positive Dead Band
0%
Dead band
(DB)
Dead band
(DB)
Cooling-side control output (%)
Heating-side control output (%)
0%
50%
Control computation output
100%
100%
Heating-side
control output
high limit
(OH)
0%
100%
0%
50%
100%
Hysteresis (HYSc)
(OUT)
Negative Dead Band
0%
0%
50%
100%
100%
0%
100%
0%
50%
100%
Dead band
(DB)
Dead band
(DB)
Cooling-side control output (%)
Heating-side control output (%)
Control computation output
Heating-side
control output
high limit
(OH)
Hysteresis (HYSc)
(OUT)
8
8.2 Setting Control Type (CNT)
Содержание UP35A
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