4.2. Data block and error status byte
The data presentation is variable. A fixed format will not be used. A blank or a <CR> with <LF> will be used as separating characters of data. The separation with <CR><LF> will only be done, if the following complete date will have more than 60 digits. Each data set will begin normally with a blank.
The data block of the command telegram has only variable data. These data depend on the function code. They can disappear for some function codes excluding the channel number. The channel number can have more than two bytes.
The data block of the response telegram is divided in fixed and variable data. The first digit of the fixed data is a blank followed by an error status byte. The error status number will be zero for an error free running analyzer or system unit. The error status number will be counted up from 1 to 9 with each change in the error status. The error status number will be zero again after the errors will be removed. Changing the status of the system will not change the error status number. The variable data depend on the function code. They can disappear for some function codes.
The long and variable floating point format or the E- Format are allowed to display the digits of numbers. You can find in each analyzer protocol which of these formats may be used. The decimal point can disappear for integers. The
You can distinguish the following cases if a date with an error exists for a reading:
(1)The transfer of the date is not possible, e.g. an analyzer in a system is missing or it cannot send a signal.
→The date will be replaced by a "#".
(2)The date is only valid with restrictions, e.g. FID temperature too low.
→The date will begin with a "#".
Range overflow and range underflow will be displayed in the same way. "Valid" means that no criterions of plausibility will be considered.
Example:
You ask for a concentration value and the analyzer is in the
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