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Reference
Section 5: Reference
Data Handling Software Safety Features
Data Stored in RAM
Before use, data associated with delivery and stored in RAM is tested
by calculating a CRC on the data and then comparing it with the CRC
stored with the data. If the stored and calculated CRCs do not match, the
soware will display a system fault screen, turn on a continuous two-
tone audible alarm, and stop all medication delivery.
Data Stored in EEPROM
Before use, data associated with delivery and stored in EEPROM is tested
by calculating a CRC on the data and then comparing it with the CRC
stored with the data. If the stored and calculated CRCs do not match, the
soware will display a system fault screen, turn on a continuous two-
tone audible alarm, and stop all medication delivery.
Data Stored in NOVRAM
Before use, data associated with delivery and stored in NOVRAM is
tested by calculating a CRC on the data and then comparing it with
the CRC stored with the data. If the stored and calculated CRCs do not
match, the soware will display a system fault screen, turn on a continu-
ous two-tone audible alarm, and stop all medication delivery.
Data Used in Calculations
Calculations on data used in some way to control the delivery of medica-
tion are performed redundantly.
e two calculated values are then compared. If the two values do not
match, the soware will display a system fault screen, turn on a continu-
ous two-tone audible alarm, and stop all medication delivery.
Timer Data Registers
e data in the Real Time Clock is checked at regular intervals. If the
data is not reasonable, the soware will turn on a continuous two-tone
audible alarm and stop all medication delivery.
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