Operating Instructions | symphony 5.3 A – 06/2009
5
Start-up
5
Start-up
30
unassigned slot COM 1/COM 2 etc. at the PC.
4. Turn PC on.
Transfer protocol:
The interface must be configured as follows:
9600 baud, 8 data bits, 1 stop bit, no parity.
Command sequences:
Structure of command frames
Data communication is achieved with a defined structure of command
sequences (frames).
Frame structure:
<STX | command | data | BCC | ETX>
Command:
Bit 0 - 3 = data field length in byte
Bit 4 - 7 = command
Check sum:
BCC = 1 - complement
(command XOR data XOR ... XOR dataN XOR FF
H
)
Command list - Reading control loop data
0110 0001 (61
H
)
Data:
0001 0000 (10
H
) for temperature during incubation operation
0001 0001 (11
H
) for CO
2
Device response for temperature and CO
2
Data:
Nominal value x 10, (2 bytes, integer)
Nominal value, (4 bytes, floating point number)
Internal use, (5 bytes for CO
2
, otherwise 7 Bytes)
Command list - Requesting failure codes
Command:
1001 0000 (90
H
)
Data:
none
Response - Reading failure codes
Failure code
The microprocessor returns a total of 10 bytes (5 integer values). Each inte-
ger value represents a current failure code in the assigned control loop
(incubation temperature, CO
2
content, general).
The failure code General failure belongs to a superior failure that is shown
simultaneously in all displays (e.g. failure code 99).
The failure codes for incubation temperature and decontamination tempe-
rature are shown in the temperature display, the codes for CO
2
are shown
in the CO
2
display. Value "---" shows that there is no current failure.
