Welch Allyn Micro Tymp 2, Руководство по обслуживанию

Страница: 45 / 66

3. Historical Slave Error Register
This register indicates any error that occurred in the Slave microcontroller during operation. The
Slave is responsible for the pressure sub-system of the MicroTymp 2. This include the operation
of the pump & motor, valve, and pressure transducer. It receives commands from the Master
microcontroller to perform the task such as pressure up, pressure down, open/close valve, read
pressure transducer, etc. The errors that can occur in the Slave are listed below:
3.1 ROM Error - $80 / 1XXXXXXX
3.1.1 Description:
This error results from the ROM memory inside the Slave microcontroller testing
bad. This memory is used to store the actual program that runs on the Slave.
3.1.2 Suggestions:
Replace the Slave microcontroller or MCU PCB, clear the error registers, power
down the unit and re-test the unit.
3.2 RAM Error - $40 / X1XXXXXX
3.2.1 Description:
This error results from the RAM memory inside the Slave microcontroller testing bad.
This memory is used to temporarily store program information while the Slave is operating.
3.2.2 Suggestions:
Replace the Slave microcontroller or MCU PCB, clear the error registers, power
down the unit, and re-test the unit.
3.3 A/D Timeout Error - $20 / XX1XXXXX
3.3.1 Description:
There is an A/D converter inside the Slave microcontroller that is used to convert the
pressure transducer value to a digital signal that can be used by the Slave in its
calculations. This A/D requires a certain amount of time to initialize before it can be
used properly. If for some reason it has been damaged this error will occur.
3.3.2 Suggestions:
Replace the Slave microcontroller or MCU PCB, clear the error registers, power
down the unit and re-test the unit.
3.4 I2C Bus Error - $10 / XXX1XXXX
3.4.1 Description:
The I2C bus is a two wire communication link between the Slave, Master, and
EEPROM. Although the Slave and Master don’t talk to each other directly using