INSTRUCTION MANUAL
FieldLogger
with 128k Memory
0141 0315-57 01. April 2009
B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
Technical changes reserved
Fon +49 771 83160 | Fax +49 771 831650 | [email protected] | bb-sensors.com
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10.
OPERATION
After configuration and installation the logger is ready to use. When you turn on the logger, the LOGGING indicator flashes in the
front panel, this indicates that the logger is operating properly. It will flash once at every 2 seconds when it is not logging and twice at
every two seconds when logging. Acquisitions start and end according to what was defined during configuration. The speed of input
channels readings depends on the number of channels enabled and type of input programmed for each channel.
The logger starts readings immediately after it is turned on. Current values found are temporarily stored in internal registers. The
logger sends the content of its internal registers when the supervisory software requires.
In the front panel there are two indicators that show when the logger is communicating with the external world. When the Rx
indicator is turned on, it means that the device is receiving data; the Tx indicator shows that data are sent outside through serial
interface.
ACQUIRED DATA COLLECTION
For the collection of data logged in local memory, it is necessary to use FieldChart or Superview software, or to build an application
in a supervisory software whose version supports the specific driver.
10.1
SERIAL COMMUNICATION
The logger has a master-slave asynchronous serial communication interface RS485 to communicate with a supervisory computer
(master). The logger is always the slave.
Communication always start with the master, which sends a command to the slave address with whom it wants to communicate. The
addressed slave undertakes the command and sends the corresponding answer to the master.
The logger also accepts broadcast commands.
Note: Recommended cables for serial communication are 3 x 24 AWG (3 x 0,25mm
2
)+ shield. This way the shield can be grounded
while cables are used for signals.