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Service Manual
Type of memory
Flash memory
EEPROM
The flash memory holds the firmware for the microcontroller. During programming, the data is written
to the flash memory via the 10-pin programming interface. The parameters read out by the LC display
module from the LC weight module after being set into operation for the very first time are stored in the
EEPROM. Both memories are protected by an LRC checksum. A data error in either of the two
memories cannot be remedied during the operation and causes a permanent fault indication.
Weighing operations are then no longer possible. Once the scale has been programmed, both
memories are protected against reading out and modifying data via the programming interface. Any
modification of the data first requires that both memories are completely cleared.
Fault handling
If faults occur, they are displayed on the LCD with the relevant fault code. Each fault message
includes the number of the module type on which the fault has occurred.
Module
LC weight module
LC display module
The following fault messages are implemented:
Fault number
11
12
13
16
40
50
60
Technical data
Supply voltage :
Supply current:
Zero-signal current:
Operating temperature: approx. 0°C to 50°C
Storage temperature:
Dimensions:
23.07.07 Kr/Rei
Size
8 Kbytes
512 bytes
Number
10
11
Fault description
Outside value range (positive or negative overload)
Switch-on zero point outside the permissible range
Zero follow-up outside the permissible range
No zero point
EEPROM checksum fault
Flash memory checksum fault
Bus communication fault
9V – 12V (via LC module bus)
typ. 11.8mA
typ. < 0.1µA
-10°C to 60°C
63mm x 42mm x 1.7mm
Description of the LC2 electronics
Page 3(6)
30-34-00-745
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