TELEDYNE OLDHAM SIMTRONICS iTRANS 2 - Page 44

iTRANS 2
FIXED POINT SINGLE OR DUAL GAS MONITOR
WITH DUAL ANALOG OUTPUTS
USER MANUAL
38
77036429-EN
Revision 7.0
Addr
Inst
R/W
Host
R/W
Range
Description
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 30 = $061E
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 minutes from $00 to $3C (00 to 60). Note that the seconds default to
zero ($00) each time the hours and minutes are set.
Examples:
13:05 = $0D05
24:00 = $1800
40124 R R/W $0000 to $FFFF
Low Alarm Display Setting
Holds the value of the gas reading at which the low alarm display will activate.
40125 R R/W $0000 to $FFFF
High Alarm Display Setting
Holds the value of the gas reading at which the high alarm display will activate.
40126 R R/W $0000 to $03E8
Cal Gas Value
Holds the value of the calibration gas to be used on the instrument. The range is from
$0000 to $03E8 (0 to 1000
10
).
40127 R/W R $0000 to $FFFF
Loop High Scaling
Holds a value which indicates the gas reading represented by a 20 mA loop output
signal. The range is from $0000 to $FFFF.
440102 R R $0000 to $FFFF
WX Scaled Reading
Use with WX series controller.
Table 6-2 ModBus Registers
NOTE: To get the ModBus reading, register 40103 must be read as well as register 40102.
Register 40103 specifies where the decimal should be placed.