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Appendix E
S
ERIAL
O
UTPUT
S
TRINGS
E.1
NGTS Time Code O/P on P4
Timing
Transmitted once per minute. Sent during the last second before the
minute rollover to which the data in the string refers
About
Normally used in conjunction with 10mS pulse on P4 pin 1 that finishes
precisely on the minute. See the hint in
Section 8.4.1
.
Comms
9600bd, 8-bit ASCII, no parity
Definition TYYMMWhhmmx<CR><LF>
Placeholder Content
T
"T"
YY
Last two digits of the year: e.g. “12” = the year 2012
MM
Month: “00” = January … “12” = December
W
Day of week: “01”=Monday … “07”=Sunday
hh
Two digit hour
mm
Two digit minute
x
Time mode: ”0” = Local time, “1” = UTC time
<CR>
Carriage Return: HEX 0A
<LF>
Line Feed: HEX 0D
Example
Interpretation
T020422112340<CR><LF>
Monday 22 April 2002 – 12:34 local time
E.2
IRIG J-17 Time Code O/P on P4
About
This code is compatible with IRIG Standard 212-00
Timing
Transmitted once every second. The leading edge of the “start” bit of the
first character <SOH> is exactly on the second that the message describes.
Comms
9600bd, 7-bit ASCII, odd parity
Definition <SOH>DDD:hh:mm:ss<CR><LF>
Placeholder Content
<SOH>
HEX 01
DDD
Day of year: range “001”—“365”
:
HEX 3A
hh
hour: “00”—”23”
mm
minute: “00”—“2
ss
Seconds: “00”—“59”
<CR>
HEX 0A
<LF>
HEX 0D
Example
Interpretation
<SOH>112:12:34:36<CR><LF>
day 112, time 12:34:36
