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(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.
Master/local
module
Temperature control module
Temperature
process
value (PV)
Temperature
process value (PV)
(RWr8 to RWrB)
Manipulated
value for
heating
PID
(MVh)
operation
Manipulated value
for heating (MVh)
Manipulated
(RWr10 to RWr13)
value for
cooling
(MVc)
Manipulated value
for cooling (MVc)
Set value
(RWr14 to RWr17)
(SV)
Initial setting
Set value (SV) setting
(REMTO instruction)
(address: 101H,
131H, 161H, 191H)
Set value
(SV)
Heating transistor
output flag
(RX30, RX32,
RX34, RX36)
Cooling transistor
output flag
(RX38, RX3A,
RX3C, RX3E)
A program in which CH3 Heating transistor output flag (RX34) is assigned to Y0 of an output module
Ex.
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.
CH1
CH1
CH□
CH2
CH2
CH3
CH3
CH4
CH4
Manipulated value
for heating (MVh)
CH1
L1H
CH□
CH2
L2H
CH3
Manipulated value
CH4
for cooling (MVc)
CH1
L1C
CH□
CH2
L2C
CH3
CH4
CH□
CH1
CH2
CH3
CH4
CH□
CH1
Heating
transistor output
CH2
(OUT instruction)
CH3
CH4
CH□
CH1
Cooling
transistor output
CH2
(OUT instruction)
CH3
CH4
Input from a temperature sensor
Heating
Cooling
Temperature
control
control
Object to be controlled
Heating
Heating
transistor output
transistor
output
Cooling transistor output
External output module
Output signals
Y00
TB1(L3H)
Manipulated value
for heating (MVh)
Y01
TB2(L4H)
Y02
TB3(L3C)
Manipulated value
for cooling (MVc)
Y03
TB4(L4C)
Y0F
TB18
CHAPTER 8 FUNCTIONS
4 channels
Input from a temperature sensor
Heating
Temperature
control
Object to be controlled
Cooling transistor output
Cooling
control
8
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