BARTEC BENKE HYGROPHIL H 4230-12 Ex Zone II, Operating Instructions Manual, Page: 98 / 112

PROFIBUS
92
Operating Instructions HYGROPHIL® H 4230-12 BA 060207
Bytes 4/5, offset high/low
Input: The offset of a variable is to be taken from the channel description
for the equipment (see section 8.3).
Example: a read operation to data address 0x0020 with an offset of
0x0000 would deliver the dew point, whereas an offset of 0x0004
would address the measured value for the relative humidity (see
channel description).
Output:
The offset of the queried variable is returned.
Byte 6, length of the data
Input: This byte determines the number of items of data to be read or
written (max. 8).
Length of the individual data types:
Float

4 bytes
Char  1 byte
Integer

2 byte (short int)
Long

4 bytes
Example: In order to read the dew point, 4 bytes must be requested.
Output: The number of items of user data written or to be read is coded in
this byte.
Byte 7, reserved
Bytes 8-15, user data
Input: In the case of a write process, the data to be written must be sub-
mitted here. This is usually not more than 4 bytes.
Output: The read process delivers the requested user data here.
Example: The dew point was submitted with the other data in IEEE 754 for-
mat.
8.2 Standby mode
If the equipment is not being used, it can be changed to this mode. In the
process, the DP target pressure is fixed at 100 Pa and the pump data is re-
duced by a factor of 10. The heating is left on.
Activating standby:
Write 0x50 (1 byte) to the address 0x0A (offset 0)
Deactivating standby:
Write 0x05 (1 byte) to the same address.
This mode is also displayed in the status code (bit 1) and can also be acti-
vated or deactivated using the keyboard (
F5
key).
While the equipment is in standby mode, the measured data must be reject-
ed!