4.9 Data exchange example — Compact format
In this example, we use Siemens S7-300 PLC (as a PROFIBUS master)
、
a GW-
7557 (as a PROFIBUS slave/HART master) and a HART slave device to read
primary variable of HART slave device.
Step 1: Copy the GSD file (Please refer to the section 4.2) and assign the
GW-7557 a valid station address (Please refer to the section 2.4).
Step 2: Connect the RS-232 port of the GW-7557 module to a COM port of
the PC and the PROFIBUS port to a PROFIBUS master (
Figure 33
).
Step 3: Set the parameters of the GW-7557. We just need to change “HART
Frame Format” to Compact and the default setting is being used in
the other parameters for this example. Please refer to section 4.3 the
Configuration of the common parameters. The users can set
parameters as shown in the below (
Figure 34
).
Figure 34 Parameter settings of GW-7557
Step 4: Set the GW-7557 modules, as shown in
Figure 35
and
Figure 36.
Select “System setting” module: “System setting” module always has
to be selected otherwise no communication can be established
GW-7557 PROFIBUS/HART Gateway User Manual
(Version 1.00, Dec/2011)
PAGE: 44
