Honeywell Notifier MODBUS-GW Installation And Operation Manual page 26

Configuration
Navigation
Tree Label
Node
Mapping
26
Table 3.3 Additional Properties (Continued)
Property
Node Mapping
Authorized Client IP This is an optional security feature. The options are:
• Enter the authorized client IP address. The gateway only responds to requests
from the client at that IP – no other Modbus clients may communicate with the
gateway. However, any computer running a browser in the local network will still
be able to access the MODBUS-GW configuration web page as normal.
• Leave the field blank to allow any client to request data. The MODBUS-GW only
communicates with one client at a time. Once MODBUS-GW accepts a client's
request to connect, it does not accept any other request to connect until the
original client has disconnected.
Gateway Unit ID Displays the unit ID that the MODBUS-GW 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 gateways, web
servers, and DVCs) 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 MODBUS-GW 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 Enter the minimum frequency (in seconds) at which the MODBUS-GW expects to
Timeout 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 MODBUS-GW stops polling the points in question. Once
the time out period expires without the MODBUS-GW 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 (for more information, refer to
(Default is 20 seconds)
Show Online or The property label toggles between "Show All Nodes" and "Show Online or Mapped
Mapped Nodes Nodes" depending on the mode selected.
- Select Yes to display the list of nodes in the mode indicated by the property label.
Show All Nodes
MODBUS-GW Installation and Operation Manual — P/N LS10015-000NF-E:C2 4/30/2019
Configuring the MODBUS-GW
Value
"4.4, "Analog Values and Trending".