Omega Engineering CN9400 S e c o n d S, e t p, o i n, SUBSIDIARY SP2 MODE, SP2 ALARM ANNUNCIATOR

SUBSIDIARY SP2 MODE: SP2.B

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.

In level 1 select	SET.2
and then set the setpoint (SP2) value (y°).

SP2 OUTPUT AND LED INDICATION STATES - IN ALARM CONDITION

Alarm type	ON-OFF		Proportional
	operating mode		operating mode
Deviation	SP2	SP2	SP2	SP2
DV.HI	Output state	LED state	Output state	LED state
DV.LO
BAND			BAND : on-off mode only

Full scale

FS.HI

FS.LO

S e c o n d S

SP

setpoint Y°

✱

SP	SP	SP
setpoint	setpoint	setpoint	Y°
		✱

COOL

Strategy

Temperature above setpoint

e t p

Without sequence

alarm

Alarms on power up

No alarm on	With sequence alarm	Alarm operates
	Alarm
power up	enabled	normally

Output ON	Output OFF	LED ON
(Relay or SSd energised)	(Relay or SSd de-energised)

SP2 ALARM ANNUNCIATOR

o i n

TO CONFIGURE SP2 AS A PROPORTIONAL CONTROL OUTPUT

In level 2 select	SP2.A
then select the required option.
In level 1 select	BND.2
and then set the required proportional band.

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	NO.AL
	ON
and option on in level 4.

SP2 in cool strategy

(See heat-cool configuration in ADVANCED SETTINGS page 23).

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