Omega Engineering CN9400 - Manual (Page 17)

Second Setpoint
SUBSIDIARY SP2 MODE :
Latch/sequence or non-linear cool.
Latch alarm LtCh
When activated, the alarm latches until manually reset, even
though the alarm condition may have disappeared.
Sequence alarm hoLd
When hoLd is selected, in any alarm mode, it prevents an
alarm signal on power-up. The alarm is enabled only after
the process temperature has reached setpoint.
TO CONFIGURE SP2 AS A PROPORTIONAL
CONTROL OUTPUT
In level 2 select
then select the required option.
In level 1 select
and then set the required proportional band.
In level 1 select
and then set the setpoint (SP2) value (y°).
SP2 OUTPUT AND LED INDICATION STATES - IN
ALARM CONDITION
SP2 ALARM ANNUNCIATOR
When an SP2 alarm mode is selected in SP2.A the alarm
annunciator -AL- is displayed, alternating with the process
temperature, during alarm condition.
Note: The annunciator may be disabled by selecting
function
and option on in level 4.
SP2 in cool strategy
(See heat-cool configuration in ADVANCED SETTINGS page 23).
✱
Without sequence
alarm
Alarms on
power up
SP
setpoint Y °
✱
Y °
SP
setpoint
SP
setpoint
SP
setpoint
No alarm on
power up
With sequence alarm
Alarm
enabled
Alarm operates
normally
Alarm type ON-OFF
operating mode
Proportional
operating mode
FS.HI
COOL
FS.LO
BAND
DV.LO
DV.HI
Deviation
Full scale
Strategy
SP2
Output state
SP2
LED state
SP2
Output state
SP2
LED state
BAND
: on-off mode only
Output ON
(Relay or SSd energised)
Output OFF
(Relay or SSd de-energised) LED ON
Temperature above setpoint
13
SP2.B
SP2.A
BND.2
SET.2
NO.AL
ON