Setting Output Parameters; Control Period; Direct Operation (Cooling)/Reverse Operation (Heating) - Omron E5AR-T User Manual

Section 4 Settings Required for Basic Control

4.7 Setting Output Parameters

■ Control Period

cp
20.0
l.adj
c-cp
20.0
l.adj

■ Direct Operation (Cooling)/Reverse Operation (Heating)

25.0
0.0
01.01
oreV
or-r
l.1
4-20
• The output period (control period) must be set. A shorter control
period improves controllability, however, when a relay is used to
control a heater, a control period of at least 20 seconds is recom-
mended to preserve product life. After setting the control period in
the initial settings, readjust it as necessary using trial operation.
• Set the values in cp (Control Period (Heating)) and c-cp (Control
Period (Cooling)). The default values are 20.0 s.
• The Control Period (Cooling) parameter can be used only in heating/
cooling control.
• When each channel is used independently for control, set the control
period separately for each channel.
• Control that increases the MV as the PV increases is called direct
operation (cooling), and control that increases the MV as the PV
decreases is called reverse operation (heating).
MV
100%
0%
Temperature is low Temperature is high
Set point
Direct Operation
• For example, when the present value (PV) is less than the set point
(SP) during heating control, the manipulated valuable (MV) is
increased in proportion to the difference between the PV and SP. As
such, heating control is "reverse operation." Cooling control, which
does the opposite, is "direct operation."
• Set the Direct/Reverse Operation parameter to or-r (reverse
operation) or or-d (direct operation). The default setting is for
reverse operation (heating).
• When each channel is used independently for control, set the direct/
reverse operation separately for each channel.
MV
100%
0%
Temperature is low Temperature is high
Set point
Reverse Operation