Oldham iTrans, User Manual, Page: 59 / 88

iTrans Fixed Point Single/Dual Gas Monitor ModBus Interface
(P/N: 77023554-1) iTrans User Manual 6-5
Addr
Inst
R/W
Host
R/W
Range Description
High byte = $01 to $0C
Low byte = $01 to $1F
Examples:
Dec 25 is represented as $0C19
June 31 is represented as $061F
40116 W R
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
40117 R R/W 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
40118 R R/W $0002 to $0063
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
40119 R R/W 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