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6-11. Events
Deviation Alarm
An alarm action point is set by a deviation of measured value (PV) from target set value (SV).
For instance, to activate an alarm when measured value (PV) reaches 30 ˚C against SV value at 20 ˚C, higher limit deviation
alarm is set at 10 ˚C. To activate alarm when measured value (PV) lowers below 30 ˚C in the case of an SV value at 100˚C,
lower limit deviation alarm is set at –70˚C. This function is convenient for an alarm action point to follow deviations from
target set value. The set range is –1999 - 2000 digits.
Absolute Value Alarm
An alarm point is set by an absolute value.
For instance, to activate an alarm when measured value exceeds 50 ˚C, higher absolute value alarm is set at 50 ˚C. To
activate an alarm when measured value lowers below 20 ˚C, lower absolute value alarm is set at 20 ˚C. Setting of higher or
lower absolute value alarm is possible as long as it is within the measuring range.
Standby Action
In case 2 or 3 is set for event standby action, there is no event output upon applying power (or changing set value, or
switching stop (RST) to execution (RUN)) even when measured value is within an event action area (an ON area). Event is
output when it reaches the event action area again after it gets out of the event action area (gets in an OFF area).
Non-standby Action
In case event standby action is set for 1 and 4, an alarm is output when measured value gets in an action area upon applying
power (or changing target set value).
Control Mode (4 is set for standby action)
No event is output at the time of scaleover. The same applies to event standby.
6-12. Setting Event Standby Action
On 5-21 Event 1 standby action code setting screen
When event output is used as an alarm, select from 1, 2 and 3 of the standby action code table.
When event output is used for control, set 4 (control mode). In case 4 is selected, however, event output turns OFF at the
time of input abnormality.
When 2 is selected, standby action functions only when power is applied.
When 3 is selected, standby action functions when power is applied and when SV in execution is changed.
When changed to 1 or 4 while standby action is going on, the standby action is released immediately.
Even when 2 or 3 is selected as standby action, it has no effect if PV value is outside the ON area of event action when
power is applied or SV is changed.
6-13. Diagrams of Alarm Actions Selectable as Event
Diagrams of alarm actions to be selected for event 1 - 3 are shown below:
6-14. Event and Status Output Actions
The following nine items can be set for status output of "5-28, 5-29, 5-30 and 5-31" as well as events:
Scaleover
: To be output when measured value (PV) gets 10% above
or below higher/lower limits of measuring range. (See
the diagram on the right.)
Hold
: To be output while HLD is set on DI input and 0-5 HLD execution setting and in communication in the
PROG mode.
Guarantee soak
: To be output while the state of guarantee remains in the PROG mode.
Time signal 1
: To be output in the ON/OFF condition set in the time signal 1 setting (1-3, 1-4, 1-5 and 1-6) in the
PROG mode. For details, see 6-15.
Time signal 2
: To be output in the ON/OFF condition set in the time signal 2 setting (1-7, 1-8, 1-9 and 1-10) in the
PROG mode. For details, see 6-15.
RUN status
: To be output while RUN action is in execution.
Step signal
: To be output for one second when a step proceeds to another in the PROG mode.
End signal
: To be output for one second when the last step ends in the PROG mode.
FIX
: To be output while RUN action is in execution in the FIX mode.
