Operation Proline Promag 53 MODBUS RS485
70 Endress+Hauser
Access to data via MODBUS
The MODBUS master uses the register addresses 5051 to 5081 to access the data area of the auto-
scan buffer. This data area contains the values of the device parameters defined in the scan list. For
example, if the register 2009 was entered for volume flow in the scan list by means of the SCAN
LIST REG. 1 function, the master can read out the current measured value of the volume flow in
register 5051.
Response time
The response time when accessing the data area (register addresses 5051 to 5081) is typically
between 3 to 5 ms.
!
Note!
It may take longer for a command to be executed in the device. The data is not updated until the
command has been executed. Especially write commands are affected by this!
Data area
Parameter value/Measured values
Access via MODBUS
register address
Data type * Access**
Value of scan list entry No. 1 → 5051 Integer / Float Read/write
Value of scan list entry No. 2 → 5053 Integer / Float Read/write
Value of scan list entry No. 3 → 5055 Integer / Float Read/write
Value of scan list entry No. 4 → 5057 Integer / Float Read/write
Value of scan list entry No. 5 → 5059 Integer / Float Read/write
Value of scan list entry No. 6 → 5061 Integer / Float Read/write
Value of scan list entry No. 7 → 5063 Integer / Float Read/write
Value of scan list entry No. 8 → 5065 Integer / Float Read/write
Value of scan list entry No. 9 → 5067 Integer / Float Read/write
Value of scan list entry No. 10 → 5069 Integer / Float Read/write
Value of scan list entry No. 11 → 5071 Integer / Float Read/write
Value of scan list entry No. 12 → 5073 Integer / Float Read/write
Value of scan list entry No. 13 → 5075 Integer / Float Read/write
Value of scan list entry No. 14 → 5077 Integer / Float Read/write
Value of scan list entry No. 15 → 5079 Integer / Float Read/write
Value of scan list entry No. 16 → 5081 Integer / Float Read/write
* The data type depends on the device parameter entered in the scan list
** The data access depends on the device parameter entered in the scan list. If the device parameter entered supports
read and write access, the parameter can also be accessed by means of the data area.
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