18
Latching function
The latching function is a function whereby the alarm continues to be output even if the value changes to a value outside the
alarm range after a value within the alarm range was detected and the alarm was first output.
Note
Unlatching cannot be conducted if the PV value is in the alarm range. For information
concerning unlatching, see screen 0-1, 0-2, 0-3, 0-4 and 6.3 DI Function.
Equipped with latching function
Standby action
Setting alarm output standby action to ON (screen 1-10 or 1-13, 1-16, 1-19) enables you to keep the alarm from being output
when power is applied as follows.
In the following figure, alarm type is set to HA. With standby action, the alarm is not output while the power is on even if alarm
output conditions are satisfied. The alarm is output when the value re-enters the alarm range after once moving out of the range.
7.2 Analog output
Analog output is a function whereby analog voltage or current is output according to the measured value. Setting the analog
output scaling lower limit value (screen 1-21) and higher limit value (screen 1-22) enables analog output signal according to
measured value within a certain measuring range.
Select whether to output analog output in hold as the hold value or as the current PV value. (Screen 1-20)
The initial value is the current PV value.
Note: Relations between error messages and output (for positive scaling)
Error messages
Analog output
HHHH 100%
LLLL 0%
CJHH 100%
CJLL 0%
b--- 0%
