GE Industrial Solutions POWER LEADER ModBus Monitor - Manual (Page 26)

POWER LEADER Modbus Monitor
Chapter 3 – Configuration
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shown below in Figure 21. The topic file’s default name
is TOPIC.CFG, but check with the PMCS administrator
to make sure that this is the correct name for your PMCS
topic file.
Figure 21. Select PMCS Topic File dialog.
You will be prompted to locate the DDE Server’s .cfg
file. Click Browse and locate the file. Highlight it and
click OK.
NOTE: If you are using the Monitor Configuration Tool
on a different PC than the PMCS DDE Server runs on,
you will not have access to the PMCS topic file directly.
Copy the topic file from the PMCS DDE Server PC to
the PC where the Configuration Tool is located. The
Configuration Tool is just reading the data out of the
topic file and does not need to access the original topic
file.
Now select the PMCS COM port of the Modbus segment
to which your Monitor will be attached. The PMCS DDE
Server can support up to 256 com ports and Modbus
segments; obviously, we want the configuration data for
the segment our Monitor will be connected to.
The PMCS Configuration data collected from the .cfg
file is displayed as shown in Figure 22.
Figure 22. PMCS Configuration information screen.
If you are satisfied with the data collected from the
PMCS .cfg file, click OK; otherwise, click Cancel.
The Configuration Tool will check the data imported
from the .cfg file for address conflicts. If address
conflicts are found the conflicting devices are not added
to the configuration.
AutoDetect
Another option to obtain segment configuration
information is to perform an AutoDetect. This function
allows the Monitor Configuration Tool to check the
Monitor’s RS-485 ports for attached devices, and create
the Device Table from the responses received from this
poll.
For this option to work, the PC running the
Configuration Tool must be connected to the Monitor via
the RS-232 port, as we’ll be asking the Monitor to
provide us with information about the network to which
it is attached. RS-485 port configuration must already
have been completed as well, so that the Monitor will be
able to properly use the RS-485 port in question.
Selecting this option causes the Monitor to begin
querying the selected Modbus segment for any devices
which may be present on the network, similar to an
electronic roll call. The Monitor sends out a message to
each Modbus address on the Modbus segment asking “Is
there anyone out there?” If there is a device present at
the address, it replies, identifying itself by Modbus
address, device type, etc.
Select AutoDetect from the Device Table dialog box to
display the AutoDetect dialog:
Figure 23. AutoDetect dialog box.
This process may take several minutes, as the Monitor
polls every Modbus address, waits for a reply, and