Azbil C7G User Manual

4-60
Chapter 4. Functions
Operation type Operation
type
setting
Direct action Reverse action
Standard numerical
code
change rate high limit
57
Sets the change rate high or low limit for the event main setting, and sets the
sampling cycle for the event subsetting. Sets the standard numerical code for the
Loop definition. Measures the value represented by the standard numerical code for
the specified sampling cycle time, and compares the change in value with the change
rate high limit or low limit to determine whether to turn on or off the event. This is the
same operation as the PV change rate high limit and PV change rate low limit.
Standard numerical
code
change rate low limit
58
AT running
(status)
65
ON when AT is running
OFF when AT is stopped
OFF when AT is running
ON when AT is stopped
During SP ramp
(status)
66
ON during SP ramp
OFF when there is no SP ramp or when it
has completed
OFF during SP ramp
ON when there is no SP ramp or when it
has completed
Control direct action
(status)
67
ON during direct action (cooling)
OFF during reverse action (heating)
OFF during direct action (cooling)
ON during reverse action (heating)
Estimating MFB
(status)
68
ON while estimating valve opening
OFF while measuring valve opening
ON while measuring valve opening
OFF while estimating valve opening
Timer
(status)
70
The direct and reverse action settings are disabled for the timer event.
To use the timer event, it is necessary to set the operation type of the DI (digital input)
to "Timer stop/start selection."
Also, setting the event number of the loop denition of the DI (digital input) enables
control of multiple timer events from dierent DIs.
●
Setting items
•
ON delay time: Time until the event changes from OFF to ON after the DI is
changed from OFF to ON
•
OFF delay time: Time until the event changes from ON to OFF after the DI is
changed from ON to OFF
●
Operation specications
•
Turns ON when DI ON continues for the ON delay time or longer.
•
Turns OFF when DI OFF continues for the OFF delay time or longer.
•
Otherwise, the current status continues.
Time
ON
Internal event
ON
DI
OFF-delayON-delay
●
Caution
The factory setting for the ON delay and OFF delay is 0.0 seconds.
The factory setting for the loop denition of DI is 0, and in this case, all timer events
can be stopped/started from a single DI.

Azbil C7G Specifications

General

Brand	Azbil
Model	C7G
Category	Controller
Language	English