LSI LASTEM M-Log – User’s manual
45
5.6
Communication modes
M-Log has got different communication devices, that can be used to extend the connection
capacities and modes to systems for data collection:
RS232 serial port: at least one port (equipped with a double connector for applications
where you want to interface M-Log with a DCE device or a DTE device) for each M-Log
datalogger; two serial ports are available for ELO008 and ELO009 models; (see §
Errore.
L'origine riferimento non è stata trovata.
)
Xxx line driver: it lengthens the cable for serial connection up to 1 km or more; the
connection speed is function of covered distance; you have always to install a couple of line
drivers: one of them must be connected to RS232 serial port of M-Log, the other one must
be connected to PC;
RS232/Ethernet converter (code LSI LASTEM DEA550): it can be used with instruments
equipped with RS232 serial line; it allows the communication using Ethernet LAN/WAN
net, so virtually of any length; particularly ELO007 model has this converter built-in;
GSM DEA714 Modem: it uses GSM network for connection to remote instruments; 9600
bps connection speed; it can be connected to serial port of M-Log; (see §
Errore. L'origine
riferimento non è stata trovata.
)
GSM/GPRS Modem (code LSI LASTEM DEA717 and DEA718): it uses GPRS packets
transmission in order to allow the permanent transmission (with transmission rate according
to choice) and rating according to traffic; it can be connected to serial port of M-Log and it’s
an application valid only for datalogger equipped with terminal board (series ELO007 e
ELO008); (see §5.6.2)
Bluetooth Adapter (code LSI LASTEM DEA300): it can be connected to serial port of M-
Log (it’s advisable use port serial 1, as able to handle sending large data frames, in excess of
128 B);
External radio devices.
5.6.1
RS232 serial port
M-Log communicates with PC through 9 poles male/female not-reversing serial cable.
M-Log implements a particular system for activation of communication port: after 8 seconds of no-
reception or no-transmission, the consumption goes down to first saving; after further 22 seconds
the consumption goes down to minimum values. If you don’t query M-Log continually, it
communicates using very low energy consumption.
Every instrument uses a net address, that consists of a number with value included between 1
(default) and 200. If the instrument has been connected through network (radio) with other
instruments, it’s necessary to modify the address. The PC programs use the address of each definite
instrument to select M-Log for sending of communication messages.
M-Log is compatible with LSI LASTEM sensors family equipped with CISS protocol. So it can be
used in existing networks of LSI LASTEM cordless sensors, that make reference to E-Log, R-Log,
Babuc ABC or receivers connected to PC directly. In this case M-Log can be programmed for
spontaneous transmission, through serial port, of instantaneous data of acquired and calculated
measurements; this parameter is available in mask for modification of
3DOM
communication
