CleaverBrooks CFC-500 Operation, Service And Parts Manual page 200

CB FALCON
SLAVE
CONTROL
WRITE
STAT
STAT2
TOD
S5
OUTDOOR
S2 4-20mA
SLAVE DATA
POLL READ
MASTER
STATUS
BROADCAST
READ BY DISPLAY
Parameter
LL - Slave enable
LL - Slave write
LL - Slave read
LL - Slave mode
750-265
MASTER SLAVE DATA
MASTER COMPATIBILITY
MASTER SERVICE STATUS
SLAVE
CONTROL
READ
OUTLET TEMPERATURE
SLAVE SEQUENCE ORDER
DEMAND-TO-FIRING DELAY
MINIMUM MODULATION pRATE
OUTDOOR TEMPERATURE
MASTER STATUS
Fig. 29. Master/Slave data transmission.
Table 34. Slave Data Supporting Lead Lag Parameters.
Disable, Enable via Modbus, Enable for Master
It enables or disables the "LL Slave" Demand and Rate module.
If the slave mode is set to Disable then:
none of the slave functions are active, LL - Slave Status register is zero, the LL – Master
Service Status register is not writable and is held at zero (this is important for pump control
which might otherwise use values in this location).
The LL - Slave Command register is writable but it is mostly ignored, however the Aux pump
X, Y, and Z are effective for any setting of the LL - Slave enable parameter.
The Enable for Falcon Master option LL - Slave write and LL - Slave read parameters; if
"Enable for Master" is not selected, then these parameters are disabled.
data
This allows the slave to accept command messages from a master.
data
This provides the slave status message to be read by a Master. It includes all of the data that
is read from a slave.
Use First, Equalize Runtime, Use Last
If set to Use First, then this slave will be used prior to using other slave units with other
values.
If this parameter is set to Equalize Runtime, then this slave will be staged according to a run
time equalization. (Any units set to Use First will precede any that are set to Equalize
Runtime.)
If this parameter is set to Use Last, then this slave will be used only after all Use First and
Equalize Runtime units have been brought online.
DEMAND
SUSPEND
FIRING RATE
OFF CYCLE FAN
PUMP X, Y, AND Z
SLAVE COMMAND T
SLAVES HAVE DEMAND
SLAVES ARE FIRING
MASTER'S HEAT DEMAND
MASTER'S ACTIVE SERVICE
SLAVE STATUS
SLAVE ACKNOWLEDGE
MODULATION pRATE
SLAVE HAS PRIORITY
SLAVE IS MODULATING
CH FROST PROTECTION REQUEST
DHW FROST PROTECTION REQUEST
FROST PROTECTION BURNER REQUEST
FIRING FOR LOCAL FROST PROTECTION
BURNER CONTROL STATUS
SLAVE COMPATIBILITY
SLAVE ENABLE
SLAVE MODE
SLAVE MBH CAPACITY
BURNER RUN TIME
BASE LOAD pRATE
Comment
76
TO BURNER CONTROL
TO FAN CONTROL
CH DHW CH FROST
DHWFROST
NONE CH
FROST WWSD
LEAD LAG ModBus MESSAGE
NOT A SEPARATE
DATA ITEM
REGISTER
PARAMETER
TERMINALS
INPUT OUTPUT
STATUS
"pRATE" = 0 TO 99.99% OF CAPACITY
T TIMEOUT: OLD DATA WILL EXPIRE
TO
PUMP
CONTROL