Nor-Cal SDC15 Controller - Manual (Page 91)

5-41
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Operation type Set value Direct action Reverse action
of operation
type
Loop diagnosis 1 20
Sub-setting
Main setting
Time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satisfied.
Area satisfying
conditions 1
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON
HYS Sub-setting
Main setting
Time
Conditions 3
ON delay
set time
ON delay is started when conditions 1 and 2 are satisfied.
Area satisfying conditions 1
Area satisfying
conditions 2
Time
Time
PV
MV
EV
ON
HYS
The event is turned ON when any change in PV corresponding to increase/decrease in MV
(Manipulated variable) is not observed.
This event is used to detect any fault at the operation end.
● Setting items
• Main setting: MV (Manipulated variable)
• Sub-setting: PV
• ON delay time: Diagnosis time
● Operation specifications
The event is turned ON when the value does not reach the PV set in the sub-setting within
the diagnosis time (ON delay time) (conditions 1) even though the MV exceeding the main
setting is held (conditions 2).
● CAUTION
When setting the ON delay, it is necessary to put in "High function configuration".
The default setting of the ON delay before shipment is 0.0s.
Heat control Cool control
* : When the event type is CT1/2 heater burnout/over-current or CT1/2 heater short-circuit,the status becomes that
the event judgment cannot be made from the time of power ON until that CT input current value is measured for
the first time. In this case, the internal event output is OFF for both of direct action and reverse action in the
direct/reverse setting. To avoid that the output becomes OFF at power ON when used in reverse action, set as
follows:
(Setting example)
For direct/reverse setting of CT1/2 heater burnout/over-current or CT1/2 short-circuit event, select the direct
action, and set the reverse operation in DO assignment calculation of the event output terminal (event terminal or
control output terminal).
CT event(direct action)
[Reverse] (DO output)
Normally open(0)
Normally open(0)
Normally open(0)