LSI LASTEM M-Log – User’s manual
23
starting value which is equal to 0); when using a 2 MB memory, this value is expanded to 1FFF; the
unitary increment of this value indicates a 256 byte consumption.
Use key
to shift to diagnostic window type 2:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
R
e
s
e
t
d
d
/
m
m
/
y
y
h
h
:
m
m
C
n
B
y
t
e
M
s
g
R
x
a
a
a
a
a
a
a
a
b
b
b
b
b
b
b
b
T
x
c
c
c
c
c
c
c
c
d
d
d
d
d
d
d
d
where:
dd/mm/yy hh:mm: date/time the statistic was last reset; resetting the statistical values can
take place locally, (by pressing at the same time of
and
keys)
or remotely through a suitable PC command;
n:
number of the instrument's serial port; go to the following line with
key;
aaaaaaaa:
number of bytes received;
bbbbbbbb:
number of messages received;
cccccccc:
number of bytes transmitted;
dddddddd:
number of messages transmitted;
This mask is very important for diagnostic reasons, in order to value the quality of communication
among M-Log datalogger (configured in master-slave mode) and between M-Log and PC.
Communication between PC and M-Log
Every standard message consists of about 13 characters; so:
In case of reception of more than 13
Rx
characters and no increase of Rx of
Msg
value
M-Log bit rate could be higher than rate set on PC
In case of reception of less than 13
Rx
characters
and no increase of Rx of
Msg
value
M-Log bit rate could be lower than rate set on PC
In case of rates set correctly, right reception of
characters but not decoded message (
Msg
value
doesn’t increase)
Could have been used different protocols or could be
communication electric problems (i.e. on 485 line, + and -
could have been inverted) or communication line is too
jammed.
In case of: rates set correctly, right reception of
characters, encoded message but no answer (Tx
of Msg value doesn’t increase)
The addressee of message isn’t stated M-Log but an other
datalogger: check network address (Protocol ID)
Communication among M-Log datalogger
The correct datalogger communication can be checked displaying that the following fields are
increased the same value with similar timing:
-
Byte
and
Msg
fields of Tx for communication serial port of slave datalogger;
-
Byte
and
Msg
fields of Rx for communication serial port of master datalogger.
