Weidmuller PMX400TMP - Display instrument for control panel Manual do Utilizador descarregar pdf (Página 4)

Siren and Group alarms

Channel four has two additional alarms types:

• Siren alarm, which you clear by acknowledging all tripped alarms

• Group alarm, which will only clear when you have acknowledged

all tripped alarms

and

all the trip conditions have cleared (and are

outside the deadband)

Sensor break alarms

You can set channel one up as a sensor break alarm, which is

triggered if the thermocouple input is open circuit or if any of the RTD

sensor legs are disconnected.

Displaying the alarm setpoints

To check a setpoint, simply press the key for that alarm.

If the display shows

A1= OC w

hen you press the alarm channel one

button, you know it is set up as a sensor break alarm.

If the display shows A4=Sr o

r A4=gr when you press the alarm

channel four button, you know it is set up as a siren or group alarm.

Adjusting the alarm setpoints

To change a setpoint, press the PGM k

ey while the value is still on

display. You will then be able to change the value using the arrows and

save the change using the ENT key. Note that setpoint security must

disabled for this to work.

Viewing the Cold Junction temperature

To view the CJC temperature, hold down the

key and then press

PGM.

Temperature range limits

Choosing a smaller displayed temperature range improves the

resolution for the analogue outputs. However it also limits the range

for setpoint and display values. So, unless you are using the analogue

outputs, you should choose the maximum range. This will give

sufficient resolution for effective alarm and display operation.

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Weidmuller PMX400TMP - Display instrument for control panel Manual do Utilizador Página 4