Form: 2405
Universal Communication Gateway Reference Manual
Date: 01-25-2019
Revision: 8
Bryan Steam LLC, 783 North Chili Avenue, Peru, IN 46970
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Phone:
765.473.6651
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21
3.2.6.2
KEYBOARD DISPLAY MODULE
S7800A
3.2.6.2.1
BMS ACTIVATION
Press the left three buttons of the Keyboard
Display Module for one second, then
release.
DISPLAY Setup will appear. If you have a
personal password, enter it to enter Setup.
Figure 18 – Honeywell RM7800 Display Setup Screen
Press ENTER by pressing the two ENTER
buttons simultaneously.
Choose Select.
Select: M B A D D R E S S, then ENTER.
00 is the default address(Modbus off). Refer
to the UCG configuration sheet (generally
shipped with boiler) for the appropriate
address and baud rate settings for each
device.
01-99 are available addresses.
Use
↑
and
↓
to select address. Press
ENTER.
The left box blinking means ModBus activity
is occurring. The right box blinking means
this address is receiving activity (see Fig.
17).
Figure 19 - Modbus Activity on RM7800
With default address 00 terminals 1, 2, 3 of
the 203541 connector are available for the
S7830 Expanded Annunciator or additional
keyboard displays. With the addresses 01-
99 enabled, ModBus is active and the S7830
Expanded Annunciator or additional
displays will NOT work. If the Expanded
Annunciator or additional displays are
required, then order the S7810M1003
ModBus card to support the ModBus
Function.
