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S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE
65-0303—05 36
Lead Lag Slave Configuration
Parameters (Hydronic Control Only)
Table 34 displays Lead Lag Slave Configuration parameters.
Fig. 68. Lead Lag slave configuration.
Lead Lag Master Configuration
Parameters (Hydronic Control Only)
Table 35 displays Lead Lag Master Configuration parameters.
Click the Advanced Settings button to see available advanced
parameters as shown in Table 36–44.
Use the left and right arrows to switch between Modulation,
CH, DHW, Frost Protection, Warm Weather Shutdown,
Algorithms, Rate Allocation, Add stage and Drop stage
parameters.
Fig. 69. Lead Lag master configuration and Advanced
Settings button.
Table 34. Lead Lag Slave
Configuration Parameters.
Parameter Comment
Slave enable Slave
ModBUS slave
Disabled
Slave mode Use first
Use last
Equalize run time
Base load rate 0–6000 rpm
Slave sequence
order
0–8
Demand to firing
delay
___hour ___min ___sec
Fan rate during off
cycle
0–12000 rpm
ModBus port MB1
MB2
No port
ModBus address 0–250
Table 35. Lead Lag Master Configuration Parameters.
Parameter Comment
Master enable Enabled
Disabled
CH setpoint -40 °F to 266 °F (-40 °C to 130 °C)
CH time of day
setpoint
-40 °F to 266 °F (-40 °C to 130 °C)
ModBus port MB1
MB2
No port
ModBus address 1–250
Table 36. Lead Lag Master Configuration
Advanced Settings: Modulation Parameters.
Parameter Comment
Modulation backup
sensor
Lead outlet sensor
Slave outlet sensor average
Disabled
Off hysteresis 0 °F to 234 °F
(-17 °C to 112 °C)
On hysteresis 0 °F to 234 °F
(-17 °C to 112 °C)
Hysteresis step time ___Hour ____Minute _____Second
P gain 0 - 400
I gain 0 - 400
D gain 0 - 400