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Model 2018 Operations Manual Rev Apr 2020 Page
22
of 41
2.7.1
TIME CHANGE LOG
The Time Change Log records the 50 most recent time changes. Data recorded: Original Date / Time Stamp, New
Date / Time Stamp, and Up Time Accumulator.
2.7.2
MONITOR RESET LOG
The monitor Reset Log records the 20 most recent resets. Data recorded: Date / Time Stamp, Faults at Time of
Reset, and Source of Reset (Front Panel, External, or Power Loss).
2.7.3
CONFIGURATION EVENT LOG
The Configuration Event Log records the ten most recent configuration changes. Data recorded: Date / Time
Stamp, Channel Compatibility, Program Card Jumpers, Printed Circuit Board DIP Switch Settings, Type of
Program Card, Factory Options set through RaeComM, and User Options set through RaeComM.
2.7.4
PRIOR FAULTS LOG
The Prior Faults Log records the 20 most recent faults. Data recorded: Date / Time Stamp; Cabinet Temperature;
Faults Reported; Status of all Greens, Yellows, Reds, and Walks; Status of all DC Inputs; Status of Red Enable;
Entire Front Panel Fault Display; AC Line Voltage; and Red Enable Voltage.
2.7.5
AC LINE LOG
The AC Line Log records the 50 most recent changes in AC line status. Data recorded: Date / Time Stamp, Event
Type (Power Up / Reset, Low Voltage, Low Voltage Recovery, Shutdown, Low Voltage Alarm, Low Voltage
Alarm Recovery, High Voltage Alarm, and High Voltage Alarm Recovery), and AC Line Voltage.
Through RaeComM, the user can adjust the High Voltage Alarm point and the Low Voltage Alarm point. These
alarm points have a fixed, three volt hysteresis. Therefore, setting the High Voltage Alarm point to 135 volts will
cause the recovery point to be set to 132 volts. Likewise, setting the Low Voltage Alarm point to 105 volts will
cause the recovery point to be 108 volts. The factory defaults for these alarm points are 105 volts for the low alarm
point and 135 volts for the high alarm point. NOTE: The log will only record when these points are crossed. The
minimum and maximum voltages seen are not recorded.
2.7.6
SIGNAL SEQUENCE LOG
The Signal Sequence Log can be configured to record events occurring prior to a fault in one of two different
modes.
Event Mode
: The Signal Sequence Log records the 60 most recent events preceding the failure. An
event is defined as an instance when any AC or DC signal, except for the Watchdog input, changes
state. The monitor checks all inputs for changes in state every 33 milliseconds for the purpose of
accumulating data for this log. Data recorded: Time Prior to Fault; Status and voltage of all Greens,
Yellows, and Reds; status and voltage of all DC inputs; status and voltage of Red Enable; status and
voltage of AC Line; and status and voltage of Special Function 1 & 2.
Time Mode
: The Signal Sequence Log records the 2 seconds preceding the failure. The monitor
records all inputs every 33 milliseconds for the purpose of accumulating data for this log. Data
recorded: Time Prior to Fault; Status and voltage of all Greens, Yellows, and Reds; status and voltage
of all DC inputs; status and voltage of Red Enable; status and voltage of AC Line; and status and
voltage of Special Function 1 & 2.
2.8
DIAGNOSTICS
The Model 2018 unit incorporates a 16-bit microprocessor as the main processing unit, a 16-bit digital signal processor (DSP), and
two 8-bit microcontrollers. The main microprocessor can be upgraded via the front panel communications port. The DSP and the two
microcontrollers are flash based and can be reprogrammed in circuit.
One of the microcontrollers is dedicated to monitoring diagnostic signals from the other microcontroller, the DSP, and the main
microprocessor. This microcontroller holds the main microprocessor in the reset state until the AC Line voltage and all supply
voltages have been verified as being within operational ranges.
The monitor has an internal buzzer that stays on to indicate when the main microprocessor is not running. This will only occur very
briefly during power up, 1.5 seconds after loss of AC power, and during major diagnostic failures.
The monitor is provided with a series of resident self-check diagnostics capabilities. When a fault is detected, the monitor transfers
the Output relay contacts to the fault condition and illuminates the front panel
DIAG FAIL
LED. Diagnostic failures are latched in
the fault condition until the unit is reset by the activation of the front panel reset switch or activation of the Reset input. A diagnostic
failure is not reset by a monitor Power Failure.