Honeywell S7999D1048 Manual page 9

Fig. 6 depicts the configuration when this S7999D is a subsystem of the System Modbus™ burner system network.
S7999D
SYSTEM DISPLAY
SYSTEM S7999D
In this configuration, the Local S7999D is a Modbus™ slave to
the S7999D that has the system view perspective (System
S7999D). Data about the local burner system is made available
to the System S7999D when it accesses the interface registers
in the Local S7999D.
The Local S7999D automatically detects UDC controllers
connected to its network and displays them on the Home page
as they are found. No user involvement is necessary at the
S7999D to make the UDC controller visible to it.
COM 1
A
CONNECT SHIELD TO EARTH GROUND.
1
SEE 65-0249 FOR CONTROL BUS (LOCAL RS-485 COMMUNICATION BUS) WIRING.
2
3 "C" TERMINALS ARE CONNECTED INTERNALLY TO 24 VAC "COM".
4 UP TO A TOTAL OF 99 S7810M AND UDC CONTROLLERS CAN BE CONNECTED TO
THE S7999D. SEE 65-0249 AND UDC MANUALS FOR WIRING.
5 MODBUS BAUD RATE MUST BE SET FOR 19200 (COM2) AND 4800 (COM1).
120 Ω, 1/4 WATT RESISTOR BETWEEN TERMINALS A AND B OF THE MODBUS AT
6
THE FARTHEST S7810M MAY BE NECESSARY FOR LONG RS-485 RUNS.
7
MAKE SURE 24 VAC POWER SUPPLY TO EACH S7999D ARE CONNECTED IN PHASE
(OBSERVE TRANSFORMER PRIMARY AND SECONDARY WINDING POLARITIES).
Fig. 7. Local S7999D with connection to System Modbus™ network wiring.
S7999D1048 COMBUSTION SYSTEM OPERATOR INTERFACE DISPLAY
UDC2500
THERMAL
SHOCK
UDC2500
STEAM/FUEL
FLOW
COM 1 OR
COM 2 UDC2500
FEED PUMP
MASTER
LEVEL CONTROL
LOCAL
MODBUS
MASTER
SYSTEM
MODBUS
1 MODBUS BAUD RATE MUST BE SET FOR EITHER 9600 OR 19200.
2 ANY MODBUS BAUD RATE CAN BE USED; HOWEVER THE SELECTED BAUD RATES MUST MATCH.
Fig. 6. Local S7999D with connection to System Modbus™ network.
SYSTEM S7999D
COM 2 24 VAC
3 3
B C A B C COM POWER
SLAVE
UDC2500
SLAVE
PID LOAD
CONTROL
SLAVE
UDC2500
SLAVE
STACK
TEMPERATURE
SLAVE
SLAVE
S7810M
MODBUS
1
COM 1 OR
COM 2
LOCAL S7999D
S7999D
COM 1 OR
SYSTEM DISPLAY
COM 2
2
SLAVE
The application type or function of the UDC controller is
automatically determined by the Local S7999D.
Each Local burner/boiler system can be designated as either a
burner system or a boiler system. This designation is specified
in the Local S7999D. Each system can also be named. This
system (equipment) name is displayed on the Home page. You
can quickly search for the S7810M and UDC controllers on the
Local Modbus™ network.
LOCAL S7999D
COM 1 COM 2
7 3
A B C A B
4 5
9
RM78xx S7830
BURNER EXPANDED
CONTROL ANNUNCIATOR
CONTROLBUS
R7999
FUEL AIR
RATIO CONTROL
M33562B
24 VAC
3
7
C COM POWER
1
2
B 8
S7810M
A 7
MODBUS
MODULE
C 6
SHLD 16
UDC2500
STACK
17
D+
TEMPERATURE
D- 18
7
M33563
65-0321—01