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3.4 Setting Alarm Type
E5EK
3--11
•
The hysteresis of alarm outputs when alarms are switched ON/OFF
can be set as follows:
ON
OFF
Alarm hysteresis
Alarm value
Alarm value
ON
OFF
Upper limit alarm
Lower limit alarm
Alarm hysteresis
•
Alarm hysteresis is set independently for each alarm in the “alarm 1
to 3 hysteresis” parameters (level 2 mode). Default is “0.02:
0.02%FS”.
•
“Standby sequence” is a function for unconditionally turning alarm
output OFF when the process value has left the alarm range once and
it next enters the alarm range.
•
For example, when the alarm type is set to “ lower-limit alarm,” gen-
erally the process value is within the alarm range, and alarm output
smaller than the set point, and alarm output becomes ON when this
state continues. However, if the alarm type is set to “ lower-limit
alarm with standby sequence”, alarm output first becomes ON when
the process value exceeds the alarm setting value to leave the alarm
range and once again falls below the alarm value.
•
The standby sequence is canceled when an alarm is output. It is, how-
ever, restarted later by one of the following conditions:
Operation is started or power is turned ON.
A pattern is started.
The program advances to the next step.
The SP of the current step is changed.
The currently running alarm value is changed.
The input shift value is changed.
Advance is executed.
J
Close in alarm/open in alarm
•
When the controller is set to “close in alarm,” the status of the alarm
output function is output as it is. When set to “open in alarm,” the
status of the alarm output function is output inverted.
Alarm
Output
Output LED
Close in alarm
ON
ON
Lit
Close in alarm
OFF
OFF
Not lit
Open in alarm
ON
OFF
Lit
Open in alarm
OFF
ON
Not lit
•
Alarm type and close in alarm (normally open)/open in alarm (nor-
mally close) can be set independently for each alarm.
•
Close in alarm/open in alarm is set in the “alarm 1 to 3 open in
alarm” parameters (setup mode). Default is “
: close in alarm”.
J
Alarm hysteresis
F
Standby
sequence
Summary of Contents for E5EK
Page 1: ...User s Manual Cat No H089 E1 02 Digital Controller Programmable Type...
Page 24: ...CHAPTER 1 INTRODUCTION 1 14...
Page 36: ...CHAPTER 2 PREPARATIONS 2 12...
Page 162: ...CHAPTER 6 USING THE COMMUNICATIONS FUNCTION 6 20...
Page 176: ...CHAPTER 7 CALIBRATION 7 14...
Page 193: ...SETTING LIST A 11...