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MMU2-1600GE series Operations Manual Rev Apr 2020 Page
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Modifying Inputs
:
Red Enable
: All red fail testing will be disabled when this input is below 70V
RMS
.
Load Switch Flash bit (bit 112) of the Type 0 Frame
: All red fail testing will be disabled when this bit is set to
one.
Feature Interactions
:
Per Channel Red Enables
: When Co-Channel / Per Channel Red Enables are enabled only channels that have
been programmed as active for this feature will be included in the displays checked for red fail.
LED Thresholds
: When LED Thresholds is enabled the Greens, Yellows, Reds, and Walks are sensed as ON
when their voltage is above 70V
RMS
and OFF when below 50V
RMS
for the red fail test.
Flashing Greens (also known as Canadian Fast Flash)
: When Flashing Greens are enabled the timer
thresholds are changed from 800 milliseconds to 1500 milliseconds for fault detection and from 300
milliseconds to 200 milliseconds for the reset of the fault timer.
PPLT5
: The Green of the child channel will be included in the red fail test for that channel. If Co-Channel
Includes Yellow is also enabled then the Green and Yellow of the child channel will be included in the red fail
test for the channel with the Green ball (Parent).
Flashing Yellow Arrow Left Turns
: A FYA signal is a logical combination of 4 indications. If the any of the
indications is off for 800ms then a red fail is indicated.
If FYA GREEN SOLO is selected and IGNORE UNUSED CHAN is YES the unused Red and Yellow signals
of the FYA parent channel are ignored for red fail.
If FYA SOLO is selected, the channel must have both RED ENABLE and FIELD CHECK/DUAL
INDICATION OFF, no MYCD jumper, and is not selected as a pedestrian channel then the unused indication
(Green or Yellow) of the FYA channel is ignored for red failure.
2.5.3
DUAL INDICATION MONITORING
Configuration:
All channels with a setting of “Y” for Dual Indication / Field Check will be monitored for the dual
indication fault. The testing defaults for this feature are all channels enabled for dual indication testing.
Test Preformed:
When operating in the Type 12 mode the following dual indications are checked for:
Red, Green + Red, Green + Yellow, and Walk + Yellow. When operating in the Type 16 mode the following dual
indications are checked for: Red, Green + Red, and Green + Yellow. When a channel has multiple
displays active a dual indication timer is started. If one of the indications turns off the dual indication timer is
stopped (it is not cleared) and a single indication timer is started. If both of the indications turn off the dual
indication timer is stopped (it is not cleared) and a no indication timer is started. If the dual indication condition
returns the single indication and no indication timers are stopped (not cleared) and the dual indication timer
continues timing from its prior value. If the dual indication timer reaches 600 milliseconds or more the monitor
will latch a dual indication fault. If the single indication timer reaches 1000 milliseconds the dual indication timer,
the single indication timer, and the no indication timer are reset to zero and the dual indication is ignored. If the no
indication timer reaches 300 milliseconds the dual indication timer, the single indication timer, and the no
indication timer are reset to zero and the dual indication is ignored. The normal voltage thresholds for this test are:
Reds – ON when above 70V
RMS
and OFF when below 50V
RMS
, Greens / Yellows / Walks – ON when above
25V
RMS
and OFF when below 15V
RMS
.
Fault Action:
The monitor transfers the Output relay contacts to the fault condition (continuity between the
Normally Open and Common contacts), illuminates the
DUAL IND
indicator on the front panel, and sets the Spare
Bit #2 bit (bit 68) of the Type 129 Frame to 1. The Signal Sequence log and the Prior Faults log will record this
fault.
Resetting the Fault:
The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
Red Enable
: All dual indication testing will be disabled when this input is below 70V
RMS
.
Load Switch Flash bit (bit 112) of the Type 0 Frame
: All dual indication testing will be disabled when this bit
is set to one.
Feature Interactions:
Field Check
: Enabling dual indication monitoring will also enable field check monitoring.
