LSI LASTEM E-Log, User Manual

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LSI LASTEM E-Log – User’s manual
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5.6. Communication modes
5.6.1. Serial port 1
E-Log interfaces with the PC by means of a non-invertible 9-poles male/female serial cable.
E-Log features a special system to activate the communication port: after 8 seconds of inactivity,
the consumption drops to a first level of savings; after further 22 seconds, the consumption drops to
the minimum values. When not continually requested, E-log communicates using very little energy.
Each instrument uses a network address, defined by a number between 1 (default) and 200.
Whenever the instrument is networked (RS485, radio) with other instruments, it will be necessary to
change the address. PC programs use the address of each specific instrument to select E-Log to
which the communication messages will be sent.
E-Log is compatible with all LSI LASTEM sensors equipped with CISS protocol. It can therefore
be used in LSI LASTEM cordless sensors networks which report to E-Log, Babuc ABC acquisition
instruments or receivers connected directly to a PC. In this case E-Log can be programmed to
transmit instant data of acquired and calculated measures spontaneously through serial port 1 or
serial port 2; this parameter can be found in the communication parameters modification window of
3DOM and is called Instantaneous values automatic transmission rate . In this mode E-Log is like a
multichannel LSI CISS sensor, and its measures can be received from other E-Log.
The serial port 1 can be connected with GSM or GPRS modem; in this case follow the instruction in
§5.7 to reduce the modem power consumption. To execute local communications with E-Log
remove the connection between the modem and serial port 1, and connect PC to the instrument
serial port directly.
Note: when the PC has to communicate with the instrument through serial port 1, it could meet
some problems to run first communication, if the serial port 1 has been programmed to execute the
frequent rhythm spontaneous data transmission (rates shorter than 10 s); in this case try more times.
Once the message is received, E-Log keeps the spontaneous communication deactivated 1 minute,
in order to make easy the possible further communications with PC.
From release 2.04.04 of E-Log has been added one facility only referred to serial communication
line 1, where the flow control can be managed according to three choices (none, only RTS,
RTS/CTS) selecting through configuration from 3DOM (see §4.4.4.3 of manual SWUM_00286
included in LSI LASTEM – MW6501 DVD).
The programming of option “
RTS/CTS
” can forbit the next communications with PC, because this
one doesn’t manage the flow control like DCE computer-equipment. For communication between
E-Log and PC arrange as follow:

Through instrument’s user interface select the statistic mask that shows the communication
speed of serial line and press F2: the instrument will configure all default parameters (9600
bps, id=1, only RTS, native protocol CISS) for selected serial line; this’s only temporary
configuration (the instrument restores the previous configuration sent from PC to its next
restart); so use this operating mode in order to re-send, through PC, one modified
configuration.