System S7999B Configuration; System Modbus Network - Honeywell S7999B Manual

S7999B SYSTEM DISPLAY

System S7999B Configuration

The S7999B can be configured to monitor all burner/boiler
systems via a System Modbus™ network. One S7999B is
designated the System S7999B (master) on the network, and
the other S7999Bs are designated as a Local S7999B (slave)
to provide system status for their respective burner/boiler
system.
LOCAL S7999B
S7999B
SYSTEM DISPLAY
SYSTEM S7999B
1 MODBUS BAUD RATE MUST BE SET FOR 19200.
Up to 99 Local burner/boiler systems can be connected
together and displayed at the System S7999B.
A Modbus™ register interface is used in the Local S7999B to
provide status data to the System S7999B. Many of the
register addresses and definitions for the burner control,
expanded annunciator, and R7999 have the same definitions
that the S7810M specifies in its interface.
65-0283—2
UP TO 99
1
SYSTEMS
COM 1
S7999B
SYSTEM DISPLAY
SLAVE
LOCAL S7999B
1
COM 1
S7999B
SYSTEM DISPLAY
1
SLAVE
COM 1
MASTER
LOCAL S7999B
SYSTEM MODBUS
1
COM 1
S7999B
SYSTEM DISPLAY
SLAVE
LOCAL S7999B
Fig. 12. System Modbus™ network.
Fig. 12 depicts this type of configuration. Only S7999Bs are
wired together in this configuration (using the COM 1 ports).
Only one S7999B can be configured as the System S7999B
on this Modbus™ network. This S7999B assumes the
Modbus™ master role on the COM 1 port. Only the System
S7999B can view any burner/boiler system on the network;
the Local S7999B can only view its own burner/boiler system.
RM78xx
BURNER
CONTROL
LOCAL BURNER/
BOILER SYSTEM
1
COM 2
UDC2500
THERMAL
SHOCK
UDC2500
STEAM/FUEL
FLOW
RM78xx
BURNER
CONTROL
LOCAL BURNER/
BOILER SYSTEM
1
COM 2
UDC2500
THERMAL
SHOCK
UDC2500
STEAM/FUEL
FLOW
RM78xx
BURNER
CONTROL
LOCAL BURNER/
BOILER SYSTEM
1
COM 2
UDC2500
THERMAL
SHOCK
UDC2500
STEAM/FUEL
FLOW
At the System S7999B a quick search for Local S7999Bs on
the System Modbus™ network can be performed. This
function is expected to be used after a new Local burner/boiler
system is attached to the System Modbus™ network. If the
quick search isn't done, a slower, automatic search eventually
finds new Local burner/boiler systems.
14
S7830 R7999
EXPANDED FUEL AIR
ANNUNCIATOR RATIO CONTROL
CONTROLBUS
S7810M
MODBUS
LOCAL MODBUS
UDC2500
FEED PUMP
LEVEL CONTROL
UDC2500
STACK
TEMPERATURE
S7830 R7999
EXPANDED FUEL AIR
ANNUNCIATOR RATIO CONTROL
CONTROLBUS
S7810M
MODBUS
LOCAL MODBUS
UDC2500
FEED PUMP
LEVEL CONTROL
UDC2500
STACK
TEMPERATURE
S7830 R7999
EXPANDED FUEL AIR
ANNUNCIATOR RATIO CONTROL
CONTROLBUS
S7810M
MODBUS
LOCAL MODBUS
UDC2500
FEED PUMP
LEVEL CONTROL
UDC2500
STACK
TEMPERATURE
UDC2500
PID LOAD
CONTROL
UDC2500
PID LOAD
CONTROL
UDC2500
PID LOAD
CONTROL
M24228