147
CHAPTER 8 FUNCTIONS
8
8.
3 T
e
mperat
ure Cont
rol
M
ode
(3) Expanded mode
In the heating-cooling control (expanded mode) or the mix control (expanded mode), the number of loops for
heating-cooling control can be expanded using an output module in the system. To use an expanded mode,
construct a system such as the one shown below.
Ex.
A program in which CH3 Heating transistor output flag (RX34) is assigned to Y0 of an output module
Assign a refresh parameter as shown below.
Create a program as shown below.
When the heating-cooling control (expanded mode) is selected, heating/cooling transistor output of CH3 and CH4 are
activated. Also, when the mix control (expanded mode) is selected, heating/cooling transistor output of CH2 is activated.
These areas are activated only when an expanded mode is selected. When a normal mode is selected, these areas are
used for the system.
Temperature
process
value (PV)
Manipulated
value for
heating
(MVh)
Output signals
Object to be controlled
Set value
(SV)
Set value
(SV)
Temperature
Object to be controlled
Manipulated
value for
cooling
(MVc)
Manipulated value
for cooling (MVc)
Manipulated value
for heating (MVh)
Manipulated value
for cooling (MVc)
Manipulated value
for heating (MVh)
PID
operation
Input from a temperature sensor
CH1
CH2
CH3
CH4
L1H
L2H
Heating
control
Cooling
control
Temperature
Heating
control
Cooling
control
Cooling transistor output
Heating
transistor output
Cooling transistor output
CH1
CH2
CH3
CH4
CH1
CH2
CH3
CH4
CH1
CH2
CH3
CH4
CH1
CH2
CH3
CH4
CH1
CH2
CH3
CH4
CH1
CH2
CH3
CH4
Heating
transistor output
(OUT instruction)
Cooling
transistor output
(OUT instruction)
L1C
L2C
Y00
Y01
Y02
Y03
Y0F
TB18
TB1(L3H)
TB2(L4H)
TB3(L3C)
TB4(L4C)
Heating
transistor
output
Input from a temperature sensor
4 channels
Initial setting
(REMTO instruction)
CH□
Manipulated value
for cooling (MVc)
(RWr14 to RWr17)
CH□
Manipulated value
for heating (MVh)
(RWr10 to RWr13)
CH□
Set value (SV) setting
(address: 101H,
131H, 161H, 191H)
CH□
Temperature
process value (PV)
(RWr8 to RWrB)
CH□
Heating transistor
output flag
(RX30, RX32,
RX34, RX36)
CH□
Cooling transistor
output flag
(RX38, RX3A,
RX3C, RX3E)
Master/local
module
Temperature control module
External output module
Summary of Contents for NZ2GF2B-60TCRT4
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