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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 and others in the system. To use an expanded
mode, construct a system such as the one 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. If data is written into these areas when it is used by the system, a write data error occurs. (error code:
2
H
)
The following is an example of using an expanded mode.
A program in which CH3 Heating transistor output flag (b0 of Un\G23) is assigned to Y20 of an output module
(The start I/O number of the Q64TCN is set to 10 in the following program example.)
Temperature
process
value (PV)
Manipulated
value for
heating
(MVh)
Buffer memory
Output signals
Object to be
controlled
Set value
(SV)
Set value
(SV)
Initial setting
(TO instruction)
Temperature
Object to be
controlled
Manipulated
value for
cool
ing
(MVc)
Manipulated value
for
cool
ing (MVc)
Manipulated value
for heating (MVh)
Manipulated value
for
cool
ing (MVc)
Manipulated value
for heating (MVh)
PID
operation
CPU
module
Input from the 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)
Cool
ing
transistor output
(OUT instruction)
Output module
on the same base unit
as the Q64TCN or
in the same network
as the Q64TCN
L1C
L2C
Y20
Y21
Y22
Y23
Y2F TB18
TB1(L3H)
TB2(L4H)
TB3(L3C)
TB4(L4C)
Q64TCN
Heating
transistor
output
Input from the temperature sensor
CH Temperature
process value (PV)
(Un\G9, Un\G10,
Un\G11, Un\G12)
CH Manipulated
value for heating (MVh)
(Un\G13, Un\G14,
Un\G15, Un\G16)
CH
Manipulated
value for cooling (MVc)
(Un
\
G704, Un
\
G705,
Un
\
G706, Un
\
G707)
CH Set value
(SV) setting
(Un\G34, Un\G66,
Un\G98, Un\G130)
b0 of CH Heating
transistor output flag
(Un\G21, Un\G22,
Un\G23, Un\G24)
b0 of CH Cooling
transistor output flag
(Un\G712, Un\G713,
Un\G714, Un\G715)
4 channels
Ex.