28.9.20
Fieldbus-Gateway UNIGATE
®
CX C4Map - PROFIBUS V. 1.0
43
Deutschmann Automation GmbH & Co. KG
Communication interface PROFIBUS DP
2. Acyclic data exchange with Class2-Master (e. g.: control unit)
This option is optional for a DPV1-Slave as well. Our gateways support this function as a default.
By means of this function the Class2-Master can read and write data from the slave acyclically.
This data is processed by the script in the gateway. The channel for the acyclic data exchange is
set up prior to every data exchange and closed again afterwards.
3. Alarm handling
Aso the alarms are optional. If they are activated, they replace the device-specific diagnosis. At
present our gateway does not support alarms.
Every DPV1-Slave must support the extended parameterization since it is determined in Octet 8
of the parameterization telegram whether it is a DPV0- or a DPV1-Slave.
A DPV1-Slave can also be operated at a DPV0-Master if the DPV1-functions remain turned off.
14.4.2 DPV2
Die DPV2-enlargement consists of the following functions:
1.
Iso
chron
M
ode (IsoM)
It means the clock-synchronous behavior of a bus system. This function is optional for a DPV2-
Slave and is activated via the GSD-file. At present our gateway does not support this mode.
2.
D
ata E
x
change
B
roadcast (DxB)
It means the communication between Slaves (inter-communication). This function is optional for
a DPV2-Slave and is activated via the GSD-file. At present our gateway only supports the func-
tion of the „Publisher“ (sending data to other Slaves). The function „Susbcriber“ (receiving data
from other Slaves) is not supported at present.
3. Up- And Download
This function is also optional for a DPV2-Slave and at present it is not supported by our gateway.
4. Time-synchronization (Time stamp)
This function is also optional for a DPV2-Slave and at present it is not supported by our gateway.
5. Redundancy concept
This function is also optional for a DPV2-Slave and at present it is not supported by our gateway.
14.5 Representation of the data in PROFIBUS DP
Any standard-compliant PROFIBUS DP Master can exchange data with the gateway. It is also
possible to use very "simple" Master connections owing to the data structure.
14.5.1 Configuration telegram
After programming, the Master must send a configuration telegram to the corresponding Slave.
The configuration telegram provides the Slave with information on the length of the input/output
data. If the user has set the ’Length byte’ flag, this means the maximum data lengths. Otherwise,
it means the actual lengths.
The user normally also configures the configuration telegram in the project planning tool where
he may also, if necessary, enter the address range in which the useful data is stored.
You can write up to 16 bytes or words in one octet of the DataUnit (DU). Inputs and outputs hav-
ing the same format can be combined in one octet. Otherwise, you must use as many octets as
the number of different bytes/words you wish to use and which cannot be combined in one octet.
Summary of Contents for UNIGATE CX C4Map
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