Chromalox 1604-7 user manual P24 = Alarm 1 action, P26 = Alarm 2 action, P30 = Smart function

P24 = Alarm 1 action

Available only when P9 = "AL1.P", "AL1.d" or "AL1.b".

dir = direct action (relay energized in alarm condi- tion)

rEV = reverse action (relay de-energized in alarm condition)

P25 = alarm 1 stand-by (mask) function Available only when P9 = "AL1.P", "AL1.d" or "AL1.b".

OFF = stand-by (mask) function disabled On = stand-by (mask) function enabled

NOTE: If the alarm is programmed as band or deviation alarm, this function masks the alarm condition after a set point change or at the instrument start-up until the process variable reaches the alarm threshold plus or minus hysteresis. If the alarm is programmed as a process alarm, this function masks the alarm condition at instrument start-up until the process variable reaches the alarm threshold plus or minus hysteresis.

P26 = Alarm 2 action

Available only when P11 = "AL2.P", "AL2.d" or "AL2.b".

dir = direct action (relay energized in alarm condition)

rEV = reverse action (relay de-energized in alarm condition)

P27 = Alarm 2 stand-by (mask) function Available only when P11 ="AL2.P", "AL2.d" or "AL2.b".

OFF = Stand-by (mask) function disabled On = Stand-by (mask)function enabled

NOTE: for more details to stand-by (mask) function, see P25 parameter.

P28 = OFFSET adjustment added to the measured value

This parameter allows to set a constant OFFSET throughout the readout range.

It is skipped for linear inputs

-For readout ranges with decimal figure, P28 is programmable from -19.9 to 19.9.

-For readout ranges without decimal figure, P28 is programmable from -199 to 199.

Readout Real curve

P28	Adjusted
	curve

Input

P29 = Displayable protected parameters

This parameter is skipped when P17 = 0.

OFF = Protected parameters cannot be displayed. On = Protected parameter can be displayed.

P30 = SMART function

This parameter is skipped when none of the outputs is programmed as control output.

0 = SMART function disabled.

1 = SMART function is NOT protected by safety lock.

2 = SMART function is under safety lock protection.

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1604-7-1-AB.p65 15 5/16/00, 10:50 AM