Reset Input Detection; Internal Diagnostics; Real Time Clock / Calendar; Display Led Test - EDI SSM-LE Series Operation Manual

SSM-LE Series
Operations Manual
and display the PROGRAM CARD status screen. The SSM-LE Series will remain in the
fault mode until the Program Card is correctly seated and the SSM-LE Series is reset by
the RESET button or the EXTERNAL RESET input.

3.6 RESET INPUT DETECTION

Activation of the front panel RESET button or the EXTERNAL RESET input will reset the
SSM-LE Series from the fault mode and cause the START relay to energize and the
OUTPUT relay to transfer to the no-fault state. Each activation of the RESET button or
EXTERNAL RESET input will cause a one time reset input to the unit. A continuously
activated RESET input will not prevent the SSM-LE Series from monitoring any fault
condition and/or transferring the OUTPUT relay contacts to the fault position. This function
prevents the Cabinet Assembly from being operated with the monitor unit disabled due to a
faulty RESET button or EXTERNAL RESET input.

3.7 INTERNAL DIAGNOSTICS

The SSM-LE Series is supplied with a resident series of self-check diagnostic capabilities
which monitor for correct operation of the SSM-LE Series both at power-up and
continuously during operation. When a diagnostic test fails, the SSM-LE Series will enter
the fault mode, transfer the OUTPUT relay contacts to the Fault position, and illuminate the
DIAGNOSTIC indicator. A Power Failure will reset the Diagnostic fault state of the monitor
(see Section 2.4). Due to the nature of these hardware/firmware failures, other fault
indicators that may be concurrently displayed with the DIAGNOSTIC indicator may not be
valid.

3.8 REAL TIME CLOCK / CALENDAR

A real time clock is provided on the SSM-LE series Signal Monitor to identify each event
occurrence with the time of day and date. This information is displayed and stored along
with the event status when the monitor is triggered by an event condition. The real time
clock is backed-up by a long life lithium energy cell and thus maintains accurate
timekeeping even during AC+ interruptions. This accuracy should remain within
approximately + _ 3 minutes per month.
The date and month are automatically adjusted for leap years. Daylight Savings Time
adjustments are made to the time of day on the Sunday specified by the start and end DLS
parameters. Daylight Savings Time parameters can be made using the EDI ECcom
software (see SET OPTIONS in the (EDI ECcom Software Operations Manual).
Setting the correct time of day and date is accomplished using the MODE and INC buttons
on the front panel (see Section 6.5.4) or by using the SET TIME command using the EDI
ECcom software.

3.9 DISPLAY LED TEST

The monitor will illuminate all front panel LED and LCD indicators for 500ms when a Reset
command is issued by the front panel RESET button or EXTERNAL RESET input. This
function provides a means to check the operation of all front panel indicators.

3.10 RECURRENT PULSE DETECTION

This error detection function supplements the normal Conflict, Dual Indication, and Red Fail
monitoring algorithms for sensing faults which are intermittent or pulsing in nature. The
RMS-Engine is designed to filter out short term transients commonly found on the electrical
service and provide noise immunity against false signal detections. The Recurrent Pulse
detection function is designed to respond to fault conditions which are intermittent in nature
and do not meet the continuous timing requirements of the normal detection algorithms, yet
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