Det-Tronics R8471J Single Channel Gas Controller, OPECL User Manual

Page 17

1.1

95-8572

When the signal decreases below the high alarm
setpoint:

— The high alarm is always latching and unaffected by

the latching/non-latching programming for the low
and auxiliary alarms. High LED is on steady until
reset.

In the event of a system fault:

— The normally energized Fault output is de-energized

and the Fault LED is illuminated.

reSet
The Reset mode is entered by pressing the Reset
button located on the front panel of the controller.

When the Reset button is momentarily depressed:

With no alarms or faults occurring — all LEDs turn off
and all outputs return to their normal condition (basic
reset).
If an alarm or fault condition exists — the basic reset
will not reset the outputs.

When the Reset button is held for 0.5 second:

If an alarm or fault condition exists — the LEDs turn off
and the outputs return to their normal condition (forced
reset).

NOTE

If an alarm or fault condition exists, the controller
will return to alarm or fault status when the reset
button is released.

Remote reset capability is also provided. (Remote reset
performs a forced reset.)

NOTE

The remote reset performs a reset function only.
It cannot be used for entering other controller
operating modes.

otHer oPeratInG MoDeS
Setpoint Display, Setpoint Adjustment, Calibration,
and 4 to 20 mA Current Output Calibration modes are
also executed by pressing buttons on the controller
faceplate. Refer to the appropriate sections of this
manual for details.