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3.4.4 Programming Serial Interface
After unlocking the keyboard, navigate to Menu “
4 Programming
” and then
“
44 Ser. Interface
” using the arrow- or number-buttons as described in chapter
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Display:
44 Ser. Interface
> 1200 8 N 1 0 Schau
1200
Baudrate (
1200
,
2400
,
4800
,
9600
,
19200
)
8
Databits (
7
,
8
)
N
Parity (
none
,
even
,
odd
)
1
Stopbits (
1
,
2
)
0
Dataoutput every 5
th
minute and on ENQ
1
Dataoutput only on ENQ (ASCII 05h) request
2
Dataoutput every second
3
Dataoutput every minute
4
Dataoutput every 5
th
minute
A Schauer Time Telegram is sent via the serial interface depending of the settings
above. The serial interface has to be ordered with the device and is not included in a
standard version of the MPU-TC.
The Schauer Time Telegram sends the actual local time of the MPU-TC. The
telegram starts with the ASCII character “*” consists of the ASCII characters “0” to “9”
and the data is separated with the ASCII character “:”. Carriage return and line feed
indicate the end of the telegram. The example below shows the telegram for August
16
th
, 2011 at 16:22:23:
*11:08:16:01:16:22:23CRLF
*
start of telegram
11
last two digits of year
08
two digits of month
16
two digits of day of the month
01
two digits of day of the week (
00
= Monday,
06
= Sunday)
16
two digits hour
22
two digits minute
23
two digits second
CRLF
carriage return followed by line feed is end of telegram
With the button
>
>
>
>
, the cursor moves to the right and the buttons
^
^
^
^
and
v
v
v
v
allow you
to change the settings for the serial interface.
Everything is stored by pressing the button
e
e
e
e
and changes are discarded with the
button
<
<
<
<
or
c.
c.
c.
c.
If anything was changed you have to confirm your entry again by
pressing the
e
e
e
e
button after the query “
Save?
” is displayed. However if the changes
shall be discarded you have to press the
c
c
c
c
button.
