5-15
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
■
Control action and Heat/Cool control
The control action (direct/reverse) and Heat/Cool control (enabled/disabled) can
be selected.
However, when the control output type is R1 (motor drive relay output), the
Heat/Cool control is not enabled.
• When the control output type is other than R1 (motor drive relay output), and
when the control method is other than the ON/OFF control (CtrL
≠
0), [C26:
Heat/Cool control] can be displayed and set.
However, in case of the position proportional control model, the Heat/Cool
control is not enabled.
• When the Heat/Cool control is set disabled (C26 = 0), [C14: Control action] can
be displayed and set.
• When the Heat/Cool control is set disabled (C26 = 0), both [C20: Preset
MANUAL value] and [C22: Initial output of PID control] are changed to "0.0".
• When the Heat/Cool control is set enabled (C26 = 1), both [C20: Preset
MANUAL value] and [C22: Initial output of PID control] are changed to "50.0".
• The reverse action (heat control) is a control that decreases (or turns OFF) the
manipulated variable (MV) as the PV increases.
The direct action (cool control) is a control that increases (or turns ON) the
manipulated variable (MV) as the PV increases.
■
Special control outputs
The control output at PV alarm and control output at READY can be set.
• When the control method is other than the ON/OFF control (CtrL
≠
0) and the
Heat/Cool control is set enabled (C26 = 1), [C18: Output at READY (cool)] can
be displayed and set.
• The PV alarm status means that AL01, 02, or 03 occurs.
Item (Bank)
Display
Contents
Initial value
User level
Control action
(direct/reverse)
(Setup bank)
0: Heat control (Reverse)
1: Cool control (Direct)
0
Basic,
Standard,
High function
Heat/Cool control
(Setup bank)
0
Basic,
Standard,
High function
0: Disabled.
1: Enabled.
Item (Bank)
Display
Contents
Initial value
User level
Output operation at PV
alarm
(Setup bank)
0: Control calculation is continued.
1: Output at PV alarm is output.
0
High function
Output at PV alarm
(Setup bank)
0.0%
High function
-10.0 to +110.0%
Output at READY (Heat)
(Setup bank)
0.0%
Standard,
High function
-10.0 to +110.0%
Output at READY (Cool)
(Setup bank)
0.0%
Standard,
High function
-10.0 to +110.0%
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