Andrew OMACS3000 11-APR-06 Rev E OMACS3000 , 7 of 51, Indicators Within the LMKVS-CPU , MC-2 Description , Motherboard Limit/Status Card (LIM-2) , Microprocessor Card (MPU-17)

11-APR-06 Rev E OMACS3000

System Description

The MC-2 and the Low Temperature Board contain LED's that indicate certain fault and status c onditions.

Within the LMKVS-CPU the MC-2 is designated A1 and the Low Temperature Board is designate d A5.

The MC-2 Motor Control Logic Assembly handles feedback from antenna mounted limit switches an d

resolvers and provides Variable Frequency Drive (VFD) and motor control for the antenna m ounted drive

motors. The MC-2 is a compact card cage based design comprising a motherboard and three vertic ally

attached daughter cards. Each card including the motherboard provides specific functionalit y and fault/status

indication. The MC-2 mounts to the LMKVS-CPU main panel by means of four standoffs .

The Motherboard Limit/Status Card handles input power distribution, provides a passive back plane for

daughter cards, and provides for 12 independent limit/status switch inputs. Each limit/status s witch input has

an associated LED indicating input logic condition. The LED's are located near the wiring input connec tors.

The LIM-2 provides the following indications based on limit/status input conditions:

Indicator Function LED Condition

DS12 Future Illuminated steady RED

DS11 Future Illuminated steady RED

DS10 Maintenance Port Cable Attached Illuminated steady RED

DS9 Handheld Detected Illuminated steady RED

DS8 Low Temperature W arning Active RED LED Extinguished

DS7 Low EL Status Switch Acti vated Illum inated steady RED

DS6 POL CCW Limit Switch Act ivated Illuminated steady RED

DS5 POL CW Limit Switch Act ivated Illuminated steady RED

DS4 EL Down Limit Switch Ac tivated Illum inated steady RED

DS3 EL Up Limit Switch Activate d Illuminated steady RED

DS2 AZ West Limit Switch Acti vated Illuminated steady RED

DS1 AZ East Limit Switch Acti vated Illuminated steady RED

DS-1 through DS-4 will blink RED simultaneously when the LIM-2 card has lost the Data Term inal Ready

(DTR) signal with the MPU-17. Additionally, DS-5 through DS-12 will blink RED simultaneousl y after loss of

good data from the MPU-17 for more than 2 seconds.

The Microprocessor Card (left most card) is 80C188 based and contains a proprietary programm ed EPROM

for storage of motor control logic executable code. The MPU-17 communicates with the LKMV S-CPU Single

Board Computer (SBC) by means of a dedicated RS-422 serial interface.

The MPU-17 provides the following status indicators and controls that are viewable from the face of the card:

DS-1 COM FLT Illuminates steady RED after loss of good data from the SBC for more than 2

seconds.

DS-2 LIM FLT Illuminates steady RED upon communication failure with the LIM-2 card and/or

indicates an internal failure of the LIM-2 card.

DS-3 MC FLT Illuminates steady RED upon communication failure with the MD-3 card and/or

indicates an internal failure of the MD-3 card.

DS-4 RES FLT Illuminates steady RED upon communication failure with the RES-2 card and/or

indicates an internal failure of the RES-2 card.