User Guide

42
(*) 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
“NNGETCNN<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 “NNSETCNN...” command the general pass-
word has to be sent in advance through the “NNPWD...”
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).
Note No validity check of the sent item value is done upon recep-
tion of a “NNSETCNN<CR>” command: this check is done
by Hanna HI 92500 software.