iTrans Fixed Point Single/Dual Gas Monitor ModBus Interface
(P/N: 77023554-1) iTrans User Manual 6-5
High byte = $01 to $0C
Low byte = $01 to $1F
Examples:
Dec 25 is represented as $0C19
June 31 is represented as $061F
Last Alarm Date (00yy)
Holds the last two digits of the year when the
instrument was last in alarm. The first two
digits are assumed to be “20”.
High byte = $00, Low byte = $02 to $63
Examples:
2002 is represented by $02
2099 is represented by $63
MSB=$01 to $0C,
LSB=$01 to $1F
RTC Month and Day
Holds the month and day to which the real time
clock (RTC) calendar should be set. The most
significant byte (MSB) represents the month
from $01 to $0C (1-12). The least significant
byte (LSB) represents the day of the month
from $01 to $1F (1-31).
Examples:
December 25 = $0C19
June 31 = $061F
RTC Year (00yy)
Holds the year to which the real time clock
(RTC) should be set. The most significant byte
(MSB) is always $00. The least significant byte
(LSB) represents the two-digit year (within the
21
st
century), from $02 (which represents 2002)
to $063 (which represents 2099).
Examples:
2002 = 02 (+ base year of 2000) = $0002
2010 = 10 (+ base year of 2000) = $000A
2099 = 99 (+ base year of 2000) = $0063
MSB=$00 to $18,
LSB=$00 to $3C
RTC Hours and Minutes
Holds the hours and minutes to which the RTC
should be set. The most significant byte (MSB)
represents the hour from $00 to $18 (00-24).
The least significant byte (LSB) represents the