CMUip-2212 Cabinet Monitor Unit
Operations Manual
Eberle Design Inc.
Page 6
2.4 TYPE 62 FSA MESSAGE
If the “N” bit is set in a Type 62 message, the CMUip-2212 will react by causing a NFSA.
The NFSA will remain until the receipt of a Message 62 with the “N” bit cleared or until the
CMUip-2212 is reset by a Unit Reset or CMUip-2212 Power Fail. The NFSA will last for the
programmed Minimum Flash time at a minimum.
If the “L” bit is set in a Type 62 message, the CMUip-2212 will react by causing a LFSA.
2.5 LACK OF SIGNAL INPUTS MONITOR
The CMUip-2212 will detect the absence of a required signal voltage on all the inputs of a
channel OR the absence of any required output load current. For voltage purposes a
required signal on the Green OR Yellow OR Red inputs associated with a channel will be
considered as that channel being Voltage Active. For load current purposes an output load
current above the programmed threshold for an output will be considered as that output
being Current Active. When a channel is not Voltage Active OR Current Active for less than
the No Fault time (section 5.2), the CMUip-2212 will not cause a LFSA. When a channel is
not Voltage Active OR Current Active for greater than the Fault time (section 5.2), the
CMUip-2212 will cause a LFSA.
If Virtual channels are used, then the Current Sense Unit (CSU) monitor function is
hardwired to the source outputs, before they are remapped. The CSU monitor function
should be programmed at the virtual channel positions (channels 29-32) and not the source
channel positions. An HDSP must not be installed into Output Assembly slots 15 and 16
when Virtual channels are used.
Lack of Signal Input monitoring will be disabled for all channels when the MC COIL
STATUS input is not active. There is programming in the Datakey to disable Lack of Signal
Input monitoring on a per output basis.
Lack of Signal Input monitoring will also be disabled for any channel which has the DARK
CHANNEL MAP bit set to "1" in the Datakey programming for the DARK CHANNEL MAP
addressed by the DARK CHANNEL MAP SELECT bits in a Type 81 (67) message.
2.6 MULTIPLE INPUT MONITOR
The CMUip-2212 will detect the presence of an active signal on two or more inputs of a
channel. When the presence of an active signal on two or more inputs of a channel is
detected for less than the No Fault time (section 5.2), the CMUip-2212 will not cause a
LFSA. When the presence of an active signal on two or more inputs to a channel is
detected for the Fault time (section 5.2) or longer, the CMUip-2212 will cause a LFSA.
Multiple Input monitoring will be disabled when the MC COIL STATUS input is not active.
There is programming in the Datakey to disable Multiple Indication monitoring on a color
combination basis (G+Y, Y+R, G+R) for each channel.
2.7 YELLOW CLEARANCE MONITOR
The CMUip-2212 will verify that the Yellow Change interval is at least 2.7 +/-0.1 seconds.
The Yellow Change interval consists of the duration of time in which the Yellow field signal
input is active in a sequence from Green to Yellow to Red. When the minimum Yellow
Change interval is not satisfied, the CMUip-2212 will cause a LFSA. The CMUip-2212 will
report a Skipped Yellow Clearance when the Yellow Change interval is less than 100
milliseconds. The CMUip-2212 will report a Short Yellow Clearance when the Yellow
Change interval is less than 2.7 +/- 0.1 seconds and greater than 100 milliseconds.
