42
43
(
*
)
C
1
C
2
C
3
C
4
are ASCII chars corresponding to the setup item
content;
P
1
P
2
are two additional bytes used for sign and half
digit as follows:
P
1
=
+
if>0
P
1
=
-
if<0
P
2
=
0
if most significant digit is not used
P
2
=
1
if most significant digit is used
When an item is shorter than 4 digits the
C
i
characters are
filled with blanks.
Following are examples for setup item format:
• item I.12, minimum pH probe slope
:
parameter value =
56.2 mV, format =
“
+0562
◊◊
“, where
◊
indicates a blank;
• item F.11, temperature reading offset adjustment: param-
eter value = -0.3°C, format = “
-00003
”;
• item G.01, temperature compensation: parameter value
= “AtC”, format = “
+0*AtC
”.
For all items with a fixed set of choices, blank spaces on the
left of the value displayed are replaced with “*” (as many “*”
characters are needed to reach the maximum string length,
which is for example 3 for item I.11).
Blanks must be put on the tail for all items in order to have
always a total length of 6 characters (see the setup table).
The same parameter format used for setup item setting is
used also for setup item getting (i.e. when a
“
NN
GET
CNN
<CR>” command is received from the PC,
the reply “
NN
<STX>
P
1
P
2
C
1
C
2
C
3
C
4
<ETX>” is sent back).
To perform a “
NN
SET
CNN
...” command the general pass-
word has to be sent in advance through the “
NN
PWD...”
command. See above for the password effectiveness time-out.
Some special setup items can not be set through RS485 com-
mands. In particular it is not possible to access any setup
item that performs a test on the instrument and it is not pos-
sible to configure the baud rate (setup item O.30).
Following is the complete list of commands available:
Command
Parameter
Remarks
NN
MDR
not available
Requests firmware code
(always available)
NN
STS
not available
Requests instrument status
(LEDs, configuration change flag, etc.)
NN
PHR
not available
Requests last pH reading
(instrument configured for pH)
NN
MVR
not available
Requests last mV reading
(always available)
NN
TMR
not available
Requests temperature reading
(always available)
NN
CAR
not available
Requests all last calibration data
(always available)
NN
GET
CNN
Requests setup item
C.NN
NN
PWD
C
1
C
2
C
3
C
4
Sends the general password
(always available)
NN
SET
CNNP
1
P
2
C
1
C
2
C
3
C
4
Sets setup item
C.NN
with
parameter
P
1
P
2
C
1
C
2
C
3
C
4
(
*
)
(not available in setup mode)
NN
EVF
not available
Requests event log file
(always available)
NN
EVN
not available
Requests new events
(always available)
NN
AER
not available
Requests active errors
(always available)
NN
KDS
null
Same as
LCD
key
NN
KCD
null
Same as
CAL DATA
key
NN
KUP
null
Same as
æ
key
NN
KRG
null
Same as key
NN
KST
null
Same as
SETUP
key
NN
KCL
null
Same as
CAL
key
NN
KDW
null
Same as key
NN
KCF
null
Same as
CFM
key