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8
8.1
Byte 0
Byte 1
Command code /
Reserved
status code
PROFIBUS
HYGROPHIL H 4230 contains a certified PROFIBUS DP interface. All field
bus-specific equipment data is listed in the GSD file „BARx077D.gsd". The
file is supplied with the product on a storage medium. The module specified
there for I/O allows the user to request data by handshake.
Framework structure
The framework structure must comply with the following guidelines:
Bytes 2/3
Bytes 4/5
Data address
Offset
high/low
high/low
Byte 0, command code / op code
This is where the command code is shown for queries and the status code is
shown for responses from the measuring unit.
Input:
0x01
Write
0x02
Read
Output: In the case of responses from HYGROPHIL, additional equipment
information is transmitted in the status code:
Bit 7: 1 = Master's query was a read access
Bit 6: 1 = Master's query was a write access
Bit 5:
Reserved
Bit 4: 1 = Hardware error
Bit 3:
Reserved
Bit 2:
Reserved
Bit 1: 1 = Equipment is in standby mode
Bit 0: 1 = A log error has occurred – please check your entry!
Byte 1, reserved
Bytes 2/3, data address high/low
Input:
The data address of the desired value is in the channel description
(see section 8.3)
(e.g. dew point corresponds to 0x20 hex entry: byte 2: 0x00,
byte 3: 0x20).
Output: When the data is input, the data address desired for the query is
entered here.
Operating Instructions HYGROPHIL® H 4230-12 BA 060207
Byte 6
Length of the
data
(please notify the customer service)
PROFIBUS
Byte 7
Bytes 8...15
Reserved
User data
91
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