Vertex VD 26 Series - Alarm Type Selection; Alarm Special Function Selection

ALARM TYPE SELECTION
A1FU/A2FU ALARM TYPE ALARM OUTPUT OPERATION
Alarm function OFF Output OFF
PV high alarm
▲ PV
SP
PV low alarm
▲ PV
SP
Deviation high alarm
▲ PV
SP+ALSP
Deviation low alarm
▲ PV
SP+ALSP
Band high alarm
OFF
▲ ▲ ▲ PV
SP-ALSP SP SP+ALSP
Band low alarm
OFF OFF
▲ ▲ ▲ PV
SP-ALSP SP SP+ALSP
PV high alarm with delay time
ALdt
▲ ▲ PV
ALSP
PV low alarm with delay time
ALdt
▲ ▲ PV
ALSP
ALARM SPECIAL FUNCTION SELECTION
ALMD DESCRIPTION
Normal alarm mode
Startup inhibit When selected, in any alarm function, prevents an alarm on power up.
The alarm is enabled only when the process value reaches the alarm set point for the first
time and is used to avoid alarm trips during startup.
Latch mode. When selected, the alarm output and indicator latch as the alarm occurs. The
alarm output and indicator will be energized even if the alarm condition has been cleared
and will only reset when the power to the controller is switched off..
Standby and latch mode
99Hours 59 Minutes
99Minutes 59Seconds
10