Technical Characteristics - Electrolux WMD1050 Service Manual

TECHNICAL CHARACTERISTICS

Control system memory
General structure of the memory system
The system features an EEPROM memory module, fitted externally to the microprocessor, which serves to
memorize the configuration data, the description of the cycle, the status of the appliance in the event of a
power failure, and the alarms.
External serial
port
ROM
(asynchronous)
ROM
The ROM (Read-Only Memory) contains the firmware code relative to the functions of the appliance:
Control of electrical loads (motor, pump, solenoid valves etc.).
Control of the sensors (pressure switches, motor speed, door status etc.).
Control of the user interface
Control of the serial port
Control of power failure procedure and alarms
Execution of the washing programme
In normal production appliances, the ROM cannot be modified.
RAM
The RAM (Random-Access Memory) contains the variables, i.e. all the dynamic information used during
execution of the programme:
Motor speed
Water temperature
Alarms
Cycle selected
Machine status
The RAM is cancelled when the power supply is disconnected (power failure or appliance switched off).
The contents of the RAM can be read using a computer connected via a DAAS interface.
The same system can be used to send commands to the electronic control unit such as:
Select remote control mode
Action the various loads in remote mode
Select diagnostics mode
Select a cycle and options, and start the cycle
µP
Internal serial
port
RAM
(Synchronous)
EEPROM
(external)
8
Power Failure and
Machine status
Configuration of
the appliance
Description
of the cycle