Proline Promass E 100 Modbus RS485
System integration
Hauser
47
0
–
1
– 2 – 3
2 – 3 –
0
–
1
Byte 16
Byte 17
(MSB)
...
Byte 0
(LSB)
Byte 1
* = factory setting, MSB = most significant byte, LSB = least significant byte
9.2.6
Modbus data map
Function of the Modbus data map
The device offers a special memory area, the Modbus data map (for a maximum of 16
device parameters), to allow users to call up multiple device parameters via Modbus RS485
and not only individual device parameters or a group of consecutive device parameters.
Grouping of device parameters is flexible and the Modbus master can read or write to the
entire data block simultaneously with a single request telegram.
Structure of the Modbus data map
The Modbus data map consists of two data sets:
• Scan list: Configuration area
The device parameters to be grouped are defined in a list in that their Modbus RS485
register addresses are entered in the list.
• Data area
The measuring device reads out the register addresses entered in the scan list cyclically
and writes the associated device data (values) to the data area.
For an overview of device parameters with their respective Modbus register
information, please refer to the "Modbus RS485 register information" section in the
"Description of device parameters" documentation .
Scan list configuration
For configuration, the Modbus RS485 register addresses of the device parameters to be
grouped must be entered in the scan list. Please note the following basic requirements of
the scan list:
Max. entries
16 device parameters
Supported device parameters
Only parameters with the following characteristics are supported:
• Access type: read or write access
• Data type: float or integer
Configuring the scan list via FieldCare or DeviceCare
Carried out using the operating menu of the measuring device:
Expert → Communication → Modbus data map → Scan list register 0 to 15
Scan list
No.
Configuration register
0
Scan list register 0
...
...
15
Scan list register 15
Summary of Contents for Proline Promass E 100
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