Register address in
Modicon
Temporary memory of VEGASCAN (1 word =
2 byte)
30012 PC/DCS output 6: Status
… …
30057 PC/DCS output 29: Measured value
30058 PC/DCS output 29: Status
30059 PC/DCS output 30: Measured value
30060 PC/DCS output 30: Status
Aa an alternative, register address 40001 is also available as
start address (function code 03).
The actual measured values are transmitted as signed data
comprising two octets. This means that the value range
encompasses max. +32768 to -32767. In addition to the
measured value, the status of the measured value is delivered
in a second register word.
Example of the data of a PC/DCS output
Measured value Status
Register addr. 30001 Register addr. 30002
High-Byte/Low-Byte High-Byte/Low-Byte
The status describes the condition of the associated measured
value. The content of the measured value is only valid if the
corresponding status has the value zero. If there is a status
value unequal zero, the status value and the corresponding
value in the measured value field must be taken into account in
a detailed failure diagnosis. The following chart explains the
possible faults.
Status Measured val-
ue
Meaning
0x00 0xXXXX Valid measured value
0xXX 0x8000 An error number is transmitted in the status
corresponding to the error codes Exx (e.g. 29 =
E29 = Simulation).
0xXX 0x00XX An error number is transmitted in the status and
in the measured value which corresponds to the
error codes Exx. Must be configured via DTM.
Format of the PC/DCS value
Modbus-TCP, VEGA ASCII protocol - VEGAMET 624/625, VEGASCAN 693, PLICSRADIO 5
Function as Modbus-TCP server
30768-EN-070730
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