Quantum Scalar 218 Notice download pdf (Page 6)

Scalar 218 Theory of Operation

adic Service Procedure 63-1181-01 Rev A 6

Operator Panel

The Operator Panel includes an eight-key keypad and a 4-line by 20-character scrollable LCD display.

The keypad and display provide a means for the operator to change operating parameters of the 218, such

as the SCSI ID of the robotics. Additionally, an Off-Line Diagnostics Menu is available via the Operator

Panel, through which a qualified technician can examine error, event, and operation logs, perform manual

pick and place operations, and calibrate the location of the Media Picker. The Operator Panel

interfaces to the Controller PCB.

Cartridge Sensors

Mounted beneath each of the 18 cartridge storage slots, the Cartridge Sensors monitor cartridge

presence. The contents of the 218 (inventory) can quickly be determined by polling these sensors.

Door Open Sensor

The sliding access door open sensor alerts the Motion Processor of the door's position (opened or

closed). If the door is opened during On-Line Mode operation, a SCSI UNIT ATTENTION message is

sent to the host. It is up to the software application running on the host to handle this condition with the

proper routine. If the door is opened while the 218 is performing a pick and place operation, the Motion

Processor automatically causes all Media Picker motion to stop.

Drive Assembly Section

One or two drive assemblies may be mounted in the Drive Assembly Section. The drive assemblies

respond to operating commands, and communicate directly with the host computer’s SCSI channel. Each

drive assembly receives operating voltages from the Power Supply Section of the 218. The only other

interface between an assembly and the 218 is the drive assembly multiplexer (Mux) card. The 218

monitors the drive assembly status through the Drive Mux Bus (see Door Open Stepper Motors).

Power Supply Section

The Power Supply Section contains 2 separate power supplies.

80 watt Switching Supply

The 80 watt switching supply is mounted in the Power Supply Section. It provides the operating voltages

for DLT drives 1 and 2.

50 watt Switching Supply

The 50 watt switching supply, mounted in the Power Supply Section, provides operating voltages to the

remainder of the 218.

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Quantum Scalar 218 Notice Page 6