Mode of operation of the system
Deutschmann Automation GmbH & Co. KG
18
UNIGATE fieldbus gateway UNIGATE CL - ProfibusDP V. 2.3
17.6.10
8
Mode of operation of the system
8.1 General explanation
Communication can be split into seven layers, Layer 1 to Layer 7, in accordance with the
ISO/OSI model.
The Deutschmann Automation Gateways convert Layers 1 and 2 of the customized bus system
(RS485 / RS232 / RS422) to the corresponding Fieldbus system. Layers 3 to 6 are blank, and
Layer 7 is converted in accordance with chapter 8.3.
8.2 Interfaces
The Gateway features the RS232-, RS422- and RS485-interfaces.
8.3 Data exchange
All data is transferred by the Gateway in dependence of the downloaded Script.
8.4 Possible data lengths
The table below shows the maximum transferable data:
Input data
max. 244 bytes
Variable: maximum value in this case
Output data
max. 244 bytes
Variable: maximum value in this case
Parameters
8 bytes
No user parameters *
Configuration data
max. 16 bytes
Dependent on configuration *
Diagnosis
max. 8 bytes
1 user diagnostic bit = error code *
*) Contrary to this default setting these parameters can be altered through special Script com-
mands.
The commands can be found in the Protocol under “Bus specific“-“Profibus“:
Set Profibus Config Data
Set Profibus Parameter InBuf
Set Profibus Diagnose
Further information can be found in the Protocol Developer’s online help.
8.5 Startup phase
The Gateway is parameterized and configured by the Master during the startup phase. Only after
a correct termination of the startup phase the data exchage with external devices will take place.
Содержание UNIGATE CL ProfibusDP
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