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MMU2-1600GE series Operations Manual Rev Apr 2020 Page
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Feature Interactions:
None
2.5.14
PROGRAMMING CARD ABSENT MONITORING
Configuration:
None
Test Preformed:
If the programming card is not present or not seated properly in the connectors the monitor
generates a fault.
Fault Action:
The monitor transfers the Output relay contacts to the fault condition (continuity between the
Normally Open and Common contacts), illuminates the
PRGM CARD
indicator on the front panel. The Signal
Sequence log and the Prior Faults log will record this fault.
Resetting the Fault:
Proper insertion of a Program Card is required before the fault can be reset. The monitor
remains in this fault condition until the unit is reset by the activation of the front panel reset pushbutton, activation
of the reset input, power loss, or power interruption. The Reset log will record the resetting of this fault.
Modifying Inputs:
None
Feature Interactions:
None
2.6
TESTING MODIFIERS
2.6.1
FLASHING DON’T WALK MONITORING
Configuration:
The setting of Flashing Don’t Walk Enabled determines if this feature is active. All channels with
a setting of “Y” for Channels with Pedestrian Displays will include a flashing red on that channel in the displays
checked for conflicts. The testing defaults for this feature are all channels disabled for Channels with Pedestrian
Displays and Flashing Don’t Walk Monitoring Enabled set to no.
Tests Modified:
Conflict
: Normal conflict testing checks active Green, Walk, and Yellow displays for being permissive. With this
feature active, any channel with a setting of “Y” will have a flashing Red included in the channels checked as
permissive. A flashing input is defined as an input that stays ON for at least 200 milliseconds and no longer than
600 milliseconds and is OFF for at least 200 milliseconds and no longer than 600 milliseconds. A Flashing Don’t
Walk conflict must exist for 1500 milliseconds to be detected as a fault. This time allows the monitor sufficient
time to detect transitions from the flashing state to the solid on state and not falsely trip.
Typical Use
: This feature is used to provide additional fault checking for Flashing Don’t Walk displays. Without
this feature a flashing Red input is never checked for conflicts.
2.6.2
PPLT5 MONITORING
Configuration:
The setting of Co-Channel / Per Channel Red Enables determines if this feature is active. All
channels with a setting of “X” for a Co-Channel Child setting will include the Green (and Walk if in Type 12
mode) on the child channel with the displays of that channel when checking for red fail. If Co-Channel Childs
Includes Yellow is enabled the Yellow of the child channel is included as well as the Green (and Walk if in Type
12 mode). Co-Channel monitoring is disabled when the RED ENABLE input is not active. The testing defaults
for this feature are all Co-Channel Childs disabled and Co-Channel / Per Channel Red Enables set to no.
When a channel is programmed as a child of another channel, it is a one way relationship. Therefore, if channel 9
is assigned as a child of channel 2 there is no implied reverse relationship of channel 2 being a child of channel 9.
If this operation is desired, it must be explicitly programmed as such.
Tests Modified:
Red Fail
: Normal red fail testing ensures that at least one display is active for a channel. With this feature active,
any channel with a setting of “Y” for a child channel will have the Green (and Walk if in Type 12 mode) of the
child channel included when checking for a red fail. If Co-Channel Childs Includes Yellow is enabled the Yellow
of the child channel is included as well as the Green (and Walk if in Type 12 mode).
Typical Use
: This feature is useful when the monitor has a channel that may have all outputs off while another
channel’s output is on for the movement of traffic. Overlaps and Protected / Permitted applications with four and
five section signal heads are common examples. Under normal operation, the Red Enable input would have to be
deactivated during the time that channel would have no output to keep a Red Fail fault from occurring. The Co-
Channel monitoring feature allows the user to select other channels that will be tested along with the parent
channel such that a Red Fail fault will only occur if the parent channel has no outputs on and the Green, Walk, and
optionally the Yellow of the child channels have no output on.
2.6.3
FLASHING YELLOW ARROW MONITORING (FYA)
Configuration:
The Wizard configures 16 types of FYA left turn configurations. To manually set up FYA in the
CONFIG SETTINGS MENU select the PERM LEFT (FYA) and FYA OPTIONS.
PERM LEFT (FYA)
