Watchdog (Cpu Overrun Monitor) Function; Configuration - Minolta EP3010 Manual

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5

WATCHDOG (CPU OVERRUN MONITOR) FUNCTION

The watchdog function monitors whether any of the CPUs mounted in the copier overrun. If
this function detects that a CPU overruns, the copier automatically resets the CPU, thereby
restarting the logic circuit and mechanism.
Even if a copier CPU operates erratically due to electrical noise, therefore, the copier is
able to recover from the faulty condition so that the number of visits made by the Technical
Representative for CPU overrun can be minimized.
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5-1.

Configuration

The copier has one printed-circuit board on which a CPU is mounted. That is the Master
Board which has the following three CPUs:
Master CPU: Controls the copier, Paper Feed Cabinet and Duplex Unit.
SCP CPU: Controls the optical system.
MSC CPU: Controls the control panel and system.
In addition to these, each of the control boards for the Data Controller, Duplexing Document
Feeder, and Sorter/Staple Sorter is equipped with a CPU.
The watchdog functions are summarized as follows:
Each of the copier CPUs monitors whether or not it overruns.
The MSC CPU monitors the communications conditions of the CPUs in the Duplexing
Document Feeder and Data Controller.
The Master CPU monitors the communications conditions of the CPUs in the Sorter and
Staple Sorter.
The control boards for the Paper Feed Cabinet and Duplex Unit do not have a CPU in
them. Instead, the Master CPU in the copier controls their operations.
Data Controller
Control Board
Sorter, Staple Sorter
Control Board (PWB-A)
= Board on which a
CPU is mounted
Duplexing
Document Feeder
Control Board (PWB-A)
Copier
SCP CPU
MSC CPU
Master CPU
Master Board PWB-A
Paper Feed Cabinet,
Duplex Unit
M-9