Requested Number (Input ”Req_Loads")
The input “Req_Loads“ is used to define the number of loads which should be in operation. The input accepts 3 types of input values which can be configured by parameter SEQ-01.
Table 1. Input “Req_Loads“ configuration
SEQ-01
|
Input signal for number of loads
|
0
|
Absolute input; values 0…N
|
1
|
Floating input; values –1 / 0 / +1
|
2
|
Percentage input; value 0…100%
|
- SEQ-01 = 0: The input is configured for absolute values (0…N). This mode is normally used for connecting other modules, like the load calculation module ”LCA_LoadCalc” or custom CARE programming.
- SEQ-01 = 1: The input is configured for floating control (+1/0/-1). A value of “+1” will increment the number of operating loads by 1. A value of “-1” will decrement the number of operating loads by 1. A value of “0” will not change the number of operating loads. The input signal must be set back to “0” after an increment/decrement command. Custom programming normally uses this mode.
- SEQ-01 = 2: The input is configured for a 0...100 % percentage value. This mode allows connecting directly a PID controller. The output signal of the PID controller is divided by the number of available loads and so the number of requested loads are calculated. The next figure shows an example for 4 loads:

Fig. 2. Calculated number of stages