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5 Serial protocol types
For each target variable, it is possible to enter the instrument address and
Modbus address used to request the value.
Each programmed inquiry can be deactivated by entering the instrument
address 0 (if, for example, the "external analog value 2" is no longer to be
written to by the Modbus master but by the Profibus).
For analog and binary values, the entry of a "Number of measured values" or
"Number of bits" larger than 1 allows reading consecutively several variables
using one command. The following target variables are automatically assigned
during saving.
Timeout defines the maximum time-out time used for each sent command to wait for
response before the next command is carried out.
Inquiry cycle defines the time interval used to read in variables.
5.3 Barcode
In the "Barcode mode" (see Chapter 3.4 Configuration of the serial interfaces,
Page 12), the paperless recorder appears as a slave. It waits for the ASCII
strings sent by the barcode scanner (master).
This interface mode only requires the setting of the "Baud rate" and "Data
format" configuration parameters, see Chapter 3.4 Configuration of the serial
interfaces, Page 12, further parameters are not required here.
The paperless recorder can use these strings for the incremental control of a
batch sequence (see operating manual of the paperless recorder).
Double writing of a target variable will lead to undefined states and
must be avoided.
Slave
Ascii Barcode Protocol
Barcode Scanner
(Master)
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