Honeywell S7999D1048, Manual

Page: 53 / 76

S7999D1048 COMBUSTION SYSTEM OPERATOR INTERFACE DISPLAY
53 65-0321—01
Fig. 127. Expanded Annunciator Setup—Save Terminal
Settings.
Fig. 128. Expanded Annunciator Setup—New Terminal
Setting.
The "Restore Default" button allows the user to restore the
Expanded Annunciator Terminal Names to the factory default
setting.
TROUBLESHOOTING
No Burner Control, Expanded
Annunciator, R7999, UDC Controller
Buttons
• Check wiring between S7999D and S7810M. Make
sure that S7810M terminal 7 (A) is connected to
S7999D terminal A (of the COM port that has been
configured for "One or more boiler systems"),
S7810M terminal 8 (B) is connected to S7999D
terminal B (of the COM port that has been configured
for "One or more boiler systems"), and S7810M
terminal 6 (C) is connected to S7999D terminal C (of
the COM port that has been configured for "One or
more boiler systems"). Check that RS-485 shield is
grounded to Earth ground.
• Insert 120

, 1/4 watt resistor between terminals A
and B on farthest S7810M or UDC controller.
• Check for duplicate Modbus™ addresses in S7810M
and UDC controller devices.
• Verify that Modbus™ baud rates in all S7810M, UDC
controller devices and the S7999D display match.
Local S7999Ds Don’t Display On
System S7999D Home Page
• Check wiring between System S7999D and all Local
S7999Ds. Make sure that the COM port in the Local
S7999D displays (to be connected to the System
S7999D display) is configured for "Local display to a
System Monitor" and the COM port in the System
R7999D (to be connected to the Local S7999D
displays) is configured for "System Monitor to one or
more Local displays". Also ensure that the wiring is
correct; terminals A to A; B to B; C to C.
• Check for duplicate Modbus™ addresses in Local
S7999Ds and that the baud rate setting in each
display match.