Справочник Пользователя для Honeywell S7999B

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65-0303—05

COM2 is a Modbus gateway for Building Automation System (BAS) 

networking.

Press the COM2 tab (see Fig. 119) to define settings:

• Enable Modbus Gateway: This box must be selected to enable 

the COM2 BAS interface.

• Modbus Gateway Speed:  Select the baud rate (38400, 19, 200, 

or 9600 bps)

• Modbus Gateway Timeout:  Defines how long the BAS will wait 

after sending a Modbus message before timing out and sending 

the next modbus message (currently non-functional; leave at 1.0)

The user can reset the display and force a power-up by pressing the 

Display Reset button. A pop-up dialog box confirming the reset 

request displays (Fig. 120) before the reset proceeds.

When the Display is reset, the display will reboot and automatically 

seek out the Modbus™ device connected to it. When the search is 

complete, the display will return to the home page.

A complete list of configurable parameters is shown in Table 61.

CH

DHW

Burner Control

Demand and Modulation

Inlet High Limit

Fan

Pump

Flame Detection

Statistics

Stack Limit

Lead Lag Slave

Lead Lag Master

Boiler Name Name to identify boiler (up to 20 

characters)

Installation

Notes regarding installation (up 

to 20 characters)

Installer 

password

Change installer password 

setting

OEM 

password

Change OEM password setting

Factory Data OEM name to associate with 

boiler (up to 20 characters)