User manual

OPERATION MANUAL
Technical changes reserved
0141 0316-155 20.04.2016
Temperature measurement system TLOG20
connections RS232, RS485, USB
Plug connector layout
Power supply: The articles 0567 0022 and 0567 0003 get their pow-
er supply via socket-plug.The inner core of the 3.5 mm socket-plug
carries positive operating voltage of approximately 9 to 15 V DC. The
outer conductor is minus.
The power supply for article 0567 0004 is given via USB-port.
Sensor- plug connector: The Western plug connector 6P6 (RJ12) on
the logger side is as shown below (view of the cable i.e. the contact
surfaces of the plug):
Automatic sensor search
The system should be congured once before rst time operation. For
this, rst all sensors are connected and operating voltage is applied.
• After pressing the ‘Conguration’ key on the board shortly for
three times (in each case, approximately pressing for 1,5 se-
conds and then pausing for one second), the program goes into
Autosearch mode. The LED consecutively blinks three times in a
cyclic manner for short duration.
• If now the ‚Conguration‘ key is operated for at least 5 seconds,
the sensors connected on the bus are searched and the new con-
guration is stored in the controller´s memory. The process can as
often be repeated as desired. After the sensors are searched and
identied, the current temperature values appear on the screen.
• To exit from the Auto search mode, the operating voltage must be
switched off for a short while. The conguration remains stored.
• During execution of Autosearch-Function, the stored calibration
values are also deleted (see below).
Format of Data transfer
The interface works at a data rate of 4800 Bd, 8 databits, no parity
and one stop bit. The transfer of useful data takes place in lines. All
characters are ASCII coded. All information is sent continuously wit-
hout separation characters. In a line, only information of one channel
is transferred. At the end of the line, the last two ASCII characters are
sent for the check sum (8 bit CRC) of the current line. Each line closes
with the character ‘Carriage return’ ‘<CR>´. Several lines form a data-
block. A data-block can have the following contents, for example:
The data block has following structure:
• A synchronization pattern for the beginning of a Data block. For
synchronization, the sequence ´@ <CR>´ is used.
• The conguration data (´Identier´) of a channel. The data line
begins with the character ‘I’, followed by the logical channel num-
ber, and then followed by conguration data and the Sensor serial
number. The line is closed with the check sum and the character
<CR>.
• The measurements of a channel. The data line begins with the
character ´V´, followed by the logical channel number, followed by
useful data. Only numerical measurement values and the check
sum (CRC), at the end of the line, are transferred. All other infor-
mation like number format, number of characters, physical unit,
etc. are contained in the conguration data (sensor coding).
• The conguration data and measurement values follow the same
scheme for all other channels.
• The continuation character ´$´ <CR>´ is sent at the end of a data-
block
Structure of Cong Dataline
The conguration data line contains all information of the sensor wor-
king on the corresponding channel. The line has following structure:
• Character ´I´ at the beginning of the line.
• 8 bits (two ASCII characters) physical sensor coding. Based on
sensor coding, the number format, scale, physical unit and allo-
wable range
• of values are specied. The sensor coding is 01 for the described
device.
1 GND
2 GND
3 Data
4 Data
5 +5V
6 +5V
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