In all the control modes, standalone or multiple boiler control, the module always provides staged control of the outputs “ST1Cmd” and “ST2Cmd”.
For 1-stage operation the capacity of stage 1 must be defined in parameter ST1-01 and parameter ST2-01 must be “0”. In this case the minimum on/ off times and blocking times for the next stages (ST2-02 – ST2-05) will be inactive.
If a 2-stage boiler control is used, both parameters ST1-01 and ST2-01 with their respective capacity value must be defined.
If ST1-01 = 0 the heat generator will never start.
Table 7. Parameter List
Description |
Value Range |
Default Value |
Unit |
ST1-01: capacity stage 1 |
0...1E6 |
10 |
kW |
ST2-01: capacity stage 2 |
0...1E6 |
10 |
kW |