Operating Instructions | HERAcell® 150i / 240i
13
Annex: Data communication
13
Annex: Data communication
50115191 A / 08.2009
136
13.6 Data logger structure
The data logger can store up to 10,000 events. Depending on the setting for
the logging cycle (in sections of seconds), e.g. for a value of 60 s (default
value), the events of about 5 days can be stored.
The data logger stores the following information:
• important user actions, system events, and error messages,
• measured data of the three control loops during incubation operation.
The data logger can be queried using the following commands:
Query:
?:2400:00::cc<CR>
Setting the data logger reading pointer to the
oldest entry and output of the first data sets.
Query:
?:2401:00::cc<CR>
Output of the following data sets,
the reading pointer automatically moves gradually from
the older entries to the current entries.
Query:
?:2402:00::cc<CR>
Repeated output of the most recently read data,
this command does not move the reading pointer. This
command can be used to avoid data loss
after a communication error has occurred.
Data logger data set structure
Each query command is responded with up to 7 data sets that follow one
another
without a separator. These data sets consist of
16 bytes and are encrypted into 32 ASCII characters prior to transmission.
For example, the byte 0x23 is converted into the ASCII characters:
0x32 (‚2’) and 0x33 (‚3’).
Therefore, a response consists of up to 7 X 16 = 112 bytes, i.e. 224 ASCII
characters.
A data set always delivers the date and the time (without seconds), the
device status and the type of data logger entry (byte 0-7 or ASCII character
0-15).
Also, depending on the entry, the current actual values or set values of the
control loops or other parameters can be entered (byte 8-15 or ASCII
character 16-31).
Example of a response:
First data set
!:2400:e0:010b01060f3700000177002800d4000011
(consisting of 32 byte ASCII characters)
Second data set 0b01060f3800000172003200d20352... ...:80
(beginning of the second data set after 32 bytes
of the first data set)
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