GE Industrial Solutions POWER LEADER ModBus Monitor - Manual (Page 24)

POWER LEADER Modbus Monitor
Chapter 3 – Configuration
18
Segment For two port Monitors, select the segment to configure;
the rest of the values in this dialog box will apply to the
segment selected here. A one-port Monitor will have
this box frozen to “A” as port B will be unavailable.
Monitor Address Select the Modbus Address for the segment selected
above. Addresses assigned to other devices will not be
available.
Baud Rate Select the communications speed for the segment. The
Monitor supports baud rates of 1200, 2400, 4800, 9600
and 19.2kbaud.
Parity If the segment being configured uses parity in its
communications, select that here. Default is none.
Flow Control If the segment being configured uses flow control in its
communications, select that here. Default is none.
Stop Bits Select the number of stop bits used by this segment.
Default is one stop bit.
If you make a mistake, press Reset to Defaults to restore
the default values.
NOTE: If you have a single-port version of the Monitor,
the segment pull down list is disabled, and you will only
need to configure the settings for Segment A. However,
for a dual port Monitor you MUST configure these
settings for BOTH ports, even if you intend to use only
one port.
Select the Monitor’s Modbus RTU address for the
segment from the Network Address pull-down list. The
valid range of Modbus addresses for a Modbus Monitor
is 1–247. Address zero is reserved for broadcast
messages, per the Modbus standard. The Modbus
address assigned to each Monitor must be unique to
avoid communication conflicts with other Modbus
devices on the RS-485 network.
NOTE: Addresses which have already been utilized will
not appear in the pull-down address list; this helps to
avoid addressing conflicts. However, you should still
check the list of device addresses for each segment to be
sure that every device has a unique Modbus address.
Click OK to accept changes and return to the main
screen.
Now that we’ve defined the monitor’s identity, we need
to set the monitor’s attributes. Modify Configuration
provides access to the Monitor’s configuration file,
which contains the parameters for the functioning of the
Monitor. Select the Modify an Existing Monitor
Configuration radio button and click OK. The Modify
Configuration screen is displayed:
Figure 18. Modify Configuration screen.
From this screen, we can select any existing monitor
configuration file and adjust any of the configuration
parameters of that file.
Select the desired configuration name from the pull-
down list at the top of the dialog box, then select the
parameter you wish to modify from the list box beneath,
and click OK. The following sections describe the
various aspects of a Monitor configuration file.
Device Table
The Monitor keeps track of the devices attached to its
Modbus segment(s) by keeping a table of devices for
each port. The Device Table lists the name, type,
location and Modbus address of each device connected
to an RS-485 port.
Figure 19. Configuration Tool Device Table screen.