Operator Control Panel - AGFA Avantra 36/44 Service Manual

Avantra 36/44 Service Manual
APIS Commands
User Commands
Figure 2-2 OCP to DEC to sensor/motor/servo flowchart.
Commands received at the DEC's u-controller direct operations to a code segment.
The code segments can be a high level operation such as a supply cut. The code
segments also can be smaller elements that combine to produce a higher operation.
Providing small command segments adds to the system flexibility in undefined vol-
atile areas. Accessing only stable code reduces the likelihood of the DEC's u-con-
troller program memory requiring updating, which has been the case in the media
handling area. Updating program memory requires reprogramming the FLASHROM.
The DEC is subdivided into the following submodules:
• Synchronous serial interface (SPI)
• Image control
• Asynchronous serial interface (on-line processor)
• System sensor, 5 x 6 matrix submodule
• Driver selection
2.5

Operator Control Panel

The operator control panel module (OCP) is the system task master. The OCP,
implemented with a micro-controller, gathers both APIS commands from a RIP and
user commands from the keyboard.
processed directly by the OCP module or sent along to the appropriate micro-
controller for processing via the SPI communication link.
2-8 Functional Analysis
Buffer
APIS Data
Control
Engine Micro-
OCP
Controller
Servo Micro-
Controller
(D.S.P.)
Diagnostics
Micro-
Modem Interface
Controller
Commands are parsed and then either
Laser
and
Driver
Position Sensors
Media Sensors
Safety Sensors
On Line Processor
DC Motors
Stepper Motors
Solenoids
Spinner Servo
Carriage Servo
Media Feed Servo