Azbil C35 Series User Manual

5-63
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Operation type Set value of
operation
type
Direct action Reverse action
Loop diagnosis 3 22 The event is turned ON when any change in PV corresponding to increase/decrease in
Manipulated variable (MV) is not observed. This event is used to detect any fault at the
operation end.
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Setting items
• Main setting: Change in PV from the point that the MV reaches the high limit (100%)
or low limit (0%).
• Sub-setting: Range of absolute value of deviation (PV-SP) allowing the event to hold
OFF state.
• ON delay time: Diagnosis time
• OFF delay time: A period of time from power ON allowing the event to hold OFF state.
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Operation specifications
The direct action is used for the heat control and is turned ON in the following cases:
• The increase in PV becomes smaller than the main setting after the diagnosis time
(ON delay time) has elapsed after the MV had reached the high limit.
• The decrease in PV becomes smaller than the main setting after the diagnosis time
(ON delay time) has elapsed after the MV had reached the low limit.
The reverse action is used for the cool control and is turned ON in the following cases:
• The decrease in PV becomes smaller than the main setting after the diagnosis time
(ON delay time) has elapsed after the MV had reached the high limit.
• The increase in PV becomes smaller than the main setting after the diagnosis time
(ON delay time) has elapsed after the MV had reached the low limit.
In the following cases, the event is turned OFF with the priority over the above
conditions:
• The absolute value of the deviation (PV-SP) becomes less than the sub-setting.
However, the event is turned OFF when the absolute value of the deviation is less
than the (sub setting – hysteresis) value after the absolute value of the deviation has
become the sub setting or more.
• A period of time after the operation has been started by power ON is less than the
OFF delay time.
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CAUTION
When setting the ON delay and OFF delay, it is necessary to put in "High function
configuration".
The default settings of the ON delay and OFF delay before shipment are 0.0s.
High limit
Low limit
Time
Conditions 3
ON delay
set time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satised.
Area satisfying
conditions 2
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON ON
HYS
HYS
PV to be used
as reference
PV to be used as reference
Main setting
(0 or more)
Main setting (0 or more)
Area satisfying
conditions 1
Area satisfying
conditions 1
Heat control
High limit
Low limit
Time
Conditions 3
ON delay
set time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satised.
Area satisfying
conditions 2
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON ON
HYS
HYS
(0 or more)
Main setting
Main setting (0 or more )
Area satisfying
conditions 1
Area satisfying
conditions 1
PV to be used
as reference
PV to be used
as reference
Cool control
(Continue on next page.)

Azbil C35 Series Specifications

General

Brand	Azbil
Model	C35 Series
Category	Controller
Language	English