6 Commissioning
Page 6-2
gas-net
C1 and C2
•
Plug in the connector that establishes the connection to the host at COM2
on the back of the
gas-net
device now. If the connection is physically and
logically okay, the data connection must be established instantaneously if
the host has been switched on and configured accordingly. You may recog-
nise this by the lighting up of the
Data to Host/Data from Host
LEDs on
the front of the DSfG gateway. Moreover, the
Host Fault
LED must have
gone out.
If the data exchange is physically okay but the data cannot be interpreted,
you have to check the associated parameter settings. For instance, a differ-
ent transmission rate may have been set erroneously for gateway and host.
•
Plug in the connector marked
DSfG
on the back of the DSfG gateway, thus
connecting the local DSfG bus. Perform a general polling at the device be-
ing the DSfG bus master, i.e. the device with the EADR “_”. If the DSfG
gateway is the bus master, you can initiate a general polling by pressing the
pushbutton marked
General polling
on the front of the
gas-net
DSfG gate-
way. The LEDs
Transmission /Reception
are flashing alternately. Even
after quite some operating time has elapsed, the
Polling Fault
LED must
not glow (unless you have changed the number of bus stations), for this
would indicate that the bus structure is erroneous or some bus stations are
unreliable.
•
Check, possibly by means of a make-dependent host-programming device,
whether all data points agreed in the DSfG gateway are being exchanged.
•
When you are convinced that the DSfG bus and host protocol run reliably at
the DSfG gateway, start with a systematic test. Each data point being
transferred should be checked from its point of creation (sensor simulation)
to its final destination (e.g. the telecontrol centre). The test is only finished,
after all data points have been thoroughly tested in this way.
The commissioning is now completed. Remove the parameterisation cable, and
make sure again that the
Polling Fault
LED still does not glow. The
gas-net
DSfG gateway should now run reliably and free of maintenance.
6.3 Commissioning the Integrated RDT
Parameterize the settings for the integrated RDT (together with all other
parameters of the
gas-net
device) using the GAS-WORKS module GW-GNET+.
