To Configure The Modbus Client; Modbus Command Support; Exception Responses; Modbus Addressing - Honeywell CGW-MB Installation And User Manual

To Configure the Modbus Client

14.Press the S6 button again until the LED indicator DL3 changes from ON to flashing.
NOTE: The configuration changes are enabled only after the CLSS Gateway mainboard
changes from the configuration mode to operational mode.
7.17 To Configure the Modbus Client
1. Open the Modbus master application you are using.
2. Specify the IP address of Eth1 port of the CGW-MB.
3. Specify the port that the Modbus client is using in the Service Port field.

7.18 Modbus Command Support

The CGW-MB supports the following Modbus commands:
• Read Input Registers (0x04)
• Read Holding Registers (0x03)
• Write Single register (0x06)
• Read Device Identification supported 43 / 14 (0x2B / 0x0E)

Exception Responses

The CGW-MB sends exception responses to its Modbus clients as appropriate (e.g.,
invalid command, invalid data, etc.). For more information, refer to
.
Responses"

Modbus Addressing

The CGW-MB uses Modbus addressing within the following guidelines:
• The CGW-MB operates similarly to a Modbus bridge. Each CGW-MB can support up to
ten panels on a network. The Modbus master addresses each fire panel in the panel's
network with a Unit ID.
• The Unit ID used in the CGW-MB must be in the range 1 to 240. This is a Modbus
range limitation.
• The Unit ID should match the node number of the node, which is being addressed. For
example, a Unit ID of 127 addresses node 127.
• The CGW-MB communicates on standard Modbus IP port 502.
NOTE: Communication on Modbus IP port 502 is not configurable and is a Modbus norm.
• Standard register types and reference ranges are:
• 0x Coil 000001–065536
• 1x Discrete Input 10001–165536
• 3x Input Register 300001–365536
• 4x Holding Register 400001–465536
For more information on Modbus addressing,

7.19 CGW-MB Control Features

7.19.1 NOTIFIER UL: Supported Commands for NFN Network
Enabling control of the CGW-MB allows the user to modify the following commands:
• Acknowledge (Block or Alarm)
• Silence (Node)
• Reset (Node)
• Activate/Deactivate (Device or Zone)
• Enable/Disable (Device or Zone)
CGW-MB Installation and Users' Manual | P/N:LS10248-000HW-E | REV.G | JUL/31/2022
See "Register Mapping" on page 58.
Modbus Communications
7.28 "Exception
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