69
“
new_events_no
” is the number of new events and its
format is the ASCII format for a number (“1”, “2” . . . .
“99”, “100”) .
When a
NN
EVF
<CR> or
NN
EVN
<CR> command is
received by the instrument, the new events list is reset and
a following
NN
EVN
<CR> command will be answered
with “
NN
<STX>0<ETX>” if no event took place in
the meantime . Thus, if the answer to
NN
EVN
<CR>
command is not received correctly, to update a remote
monitor for events, the
NN
EVF
<CR> command for the
whole event log file must be used .
Note
After a reset of the instrument, the answer to
NN
EVN
<CR>
is the same as
NN
EVF
<CR> (all events are new) .
Note
A modified record due to the closing of an error is not
transmitted by
NN
EVN
<CR>, so again the
NN
EVF
<CR>
command is needed .
A small subset of the event log file, with information
about the active errors, can be downloaded through the
NN
AER
<CR> command, always available, even during
controlling . The answer is:
“
NN
<STX>
C
1
C
2
C
3
C
4
C
5
C
6
<ETX>”
where
C
1
C
2
are the ASCII representation of byte
B
1
de-
scribed below (e .g .
B
1
= 0xF3
C
1
= “F”,
C
2
= “3”),
C
3
C
4
are the ASCII representation of byte
B
2
described
below (e .g .
B
2
= 0x1D
C
3
= “1”,
C
4
= “D”),
C
5
C
6
are the ASCII representation of byte
B
3
described below
(e .g .
B
3
= 0xBE
C
5
= “B”,
C
6
= “E”) .
The meaning of
B
1
,
B
2
,
B
3
is:
B
3
bit 0
Alarm for setpoint 1
B
3
bit 1
Alarm for setpoint 2
B
3
bit 2
Maximum relay ON time exceeded
B
3
bit 3
Life check error
B
3
bit 4
pH electrode broken or leakage
B
3
bit 5
Reference electrode broken or leakage
B
3
bit 6
Old pH probe
B
3
bit 7
Dead pH probe
B
2
bit 0
Calibration time-out
B
2
bit 1
Temperature probe broken
B
2
bit 2
free for future use (and set to 0)
