CGW-MB Installation and Users’ Manual | P/N:LS10248-000HW-E | REV.G | JUL/31/2022
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To Configure the Modbus Settings
Modbus Communications
12.In the
MODBUS
CLSS Gateway mainboard SETTING
page, provide the required
details for the Modbus client.
Table 7.6: Settings for Modbus Client Communications
Field
Description
Authorized Client IP
This is an optional security feature.
• Enter the authorized client IP address. The CLSS Gateway mainboard only
responds to requests from the client at that IP – no other Modbus clients may
communicate with the CLSS Gateway mainboard. However, any computer running
a browser in the local network will still be able to access the CGW-MB configuration
web page as normal.
Or
• Enter 0.0.0.0 to allow up to 2 clients to connect at a given time.
CLSS Gateway
mainboard Unit ID
Displays the unit ID that the CGW-MB uses in the Modbus network. This is a
configurable property of the nodes. By default, the Modbus Unit ID for a
monitored node is set to be the same as the NFN Node ID.
If for any reason the unit ID needs to be changed, click the value and enter the
new unit ID number. Since each unit ID in the Modbus network needs to be
unique, change this number only if there is a conflict in the unit IDs in the
Modbus network.
Note
: Each of the 240 possible nodes on the NFN network (except for CLSS
Gateway mainboards and web servers) is automatically assigned a Modbus
Unit ID. When a new unit ID number for a node is entered, the old unit ID
number is reassigned to whichever node previously used the new unit ID
number.
However, the CGW-MB configuration web page does accept a new unit ID
number that is currently being used by a monitored node. In order to reassign a
unit ID number used by a monitored node, first assign a new unit ID number for
the monitored node.
Analog Value
Timeout
Enter the minimum frequency (in seconds) at which the CGW-MB
expects to receive continuing polls from clients seeking analog values
from 4-20 mA devices.
When a client that had been polling a set of analog values fails to re-
poll the values within the time out period, the CGW-MB stops polling
the points in question. Once the time out period expires without the
CGW-MB receiving a repeated poll, any further poll received will be
treated as a new poll, and the first read will be considered an
initialization read.
Default value is 15 seconds.
NODE MAPPING
Show All Nodes
• Select
Yes
to display all the nodes in the network.
• Select
No
to display only the nodes that the panel monitors in the network.
Node Status
Shows the operational status of each nodes displayed. It would be
Online
or
Offline
.
Node ID
Displays the number of each node in the NFN network.
Node Type
Shows the brand name of the node. For example, NFS2-3030.