
MMU-16LE
SmartMonitor
Operations Manual
Eberle Design Inc.
Page 14
Programming for Dual Indication is provided in the SET / VIEW CONFIG menu item to
enable Dual Indication Monitoring on a per channel basis. See Section 6.3.2 for the
programming procedure.
Dual Indication Monitoring will be disabled when the RED ENABLE input is not active.
3.2.1 WALK DISABLE OPTION
This option will modify the operation of Red Fail and Dual Indication Monitoring in the TS-1
Type 12 mode only. When enabled, the Red Fail and Dual Indication Monitoring function
will not monitor the Walk field outputs. Absence of signals on the Green, Yellow, and Red
field outputs of a channel will place the MMU-16LE
SmartMonitor
®
into the Red Fail fault
mode causing the Output relay contacts to transfer. Presence of active signals on the Walk
outputs will not cause a Dual Indication when concurrent with active Red or Yellow signals.
This function is enabled by the Unit Option called "WALK DISABLE" in the SET / VIEW
CONFIG menu. See Section 6.3.4.2.
3.3 EXTERNAL WATCHDOG MONITORING
This function monitors an optional external watchdog output from a Controller Unit or other
external cabinet circuitry. The external source should toggle the EXTERNAL WATCHDOG
input logic state once every 100 msec. If the MMU-16LE
SmartMonitor
®
does not receive a
change in state on the EXTERNAL WATCHDOG input for the External Watchdog Fault
time (Section 9), the MMU-16LE
SmartMonitor
®
will enter the fault mode, transfer the
OUTPUT relay contacts to the Fault position, and display the EXT WATCHDOG status
screen. When operating in the Type 16 mode with Port 1 communications enabled, Bit #70
(Spare Bit #4) of the Type #129 response frame will be set to indicate an External
Watchdog fault has been detected. The MMU-16LE
SmartMonitor
®
will remain in the fault
mode until the unit is reset by the RESET button or the EXTERNAL RESET input. An MMU
Power Failure will also reset the External Watchdog fault state of the monitor (see Section
2.6).
This function is enabled by a UNIT Option called EXTERN WATCHDOG in the SET / VIEW
CONFIG menu (see Section 6.3.4.4). The EXTERNAL WATCHDOG input is harnessed to
spare pin MSB-S on the front panel B connector by the factory.
3.4 PROGRAM CARD ABSENT INDICATION
If the Program Card is absent or not seated properly in the edge connector, the MMU-16LE
SmartMonitor
®
will enter the fault mode, transfer the OUTPUT relay contacts to the Fault
position, and display the PGM CARD AJAR status screen. The MMU-16LE
SmartMonitor
®
will remain in the fault mode until the Program Card is correctly seated and the MMU-16LE
SmartMonitor
®
is reset by the RESET button or the EXTERNAL RESET input.
3.5 RESET INPUT DETECTION
Activation of the front panel RESET button or the EXTERNAL RESET input will reset the
MMU-16LE
SmartMonitor
®
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 MMU-16LE
SmartMonitor
®
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.
3.6 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.