Red-lion TSC User Manual download pdf (Page 40)

Alarm Reset (rSt1, rSt2)

Each alarm reset action may be independently configured.

LAtC - Latching

Auto - Automatic

Latched alarms require operator acknowledgment to reset the alarm

condition. The front panel buttons can be used to reset an alarm when the

controller is in the hidden mode (see hidden function mode). An Alarm

condition may also be reset via the RS-485 serial interface or by the user input.

Automatic (Auto) reset alarms are reset by the controller when the alarm

condition clears. The alarm reset figure depicts the reset types.

ALARM RESET SEQUENCE

Alarm Standby Delay (Stb1, Stb2)

The alarm(s) may be independently configured to exhibit a power-on,

standby delay which suppresses the alarm output from turning “ON” until the

temperature first stabilizes outside the alarm region. After this condition is

satisfied, the alarm standby delay is canceled and the alarm triggers normally,

until the next controller power-on. The alarm standby delay figure depicts a

typical operation sequence.

ALARM STANDBY DELAY SEQUENCE

Alarm Value (AL-1, AL-2)

The alarm values are either absolute (absolute alarms) or relative to the

setpoint value (deviation and band alarms). An absolute alarm value is the value

that is entered. A relative alarm value is offset from the temperature setpoint

value by the amount entered and tracks the setpoint value as it changes.

AL-1 and AL-2 - -999 to 9999

If the alarm action is set as a Band Alarm, then only a positive value can be

entered.

AL-1 and AL-2 - 0 to 9999

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Red-lion TSC User Manual Page 40