Method of operation
2
gas-net
C1 and C2
Page 2-1
2 How
the
gas-net DSfG Gateway works
The illustration below shall explain how the
gas-net
DSfG Gateway works in
principle. The comprehension of the way the
gas-net
gateway works is essential
for the following description of the device operation and parameterisation.
DSfG
Bus
DSfG
Gateway
Host
Transfer
memory,
Calculations
Import values
Export values
DSfG job list
Export values
Import values
Host job list
Structure of a
gas-net
C1 DSfG Gateway
The
gas-net
gateway cyclically executes a job list for the DSfG side and one for
the host side, one independent of the other. The results of import jobs are al-
ways stored as data points in a transfer memory, whereas export jobs always
take their data points from the transfer memory that has been filled before. The
job lists themselves are generated by a PC during commissioning and para-
meterised in the gateway.
To a limited extent, the
gas-net
DSfG Gateway can also calculate with the data
points of the transfer memory. This function will be described in the following
chapters, too.
