KSB CalioTherm Pro 25 Installation & Operating Manual page 54

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7 Operation
NOTE
Connected pump sets will use the settings of the other pump sets. This does not
apply to the Modbus address.
Table 27: Activating and de-activating the Dual-pump Operation (DUAL) operating
mode
Step 1: Activating the functions (DUAL, Modbus, 0 - 10 V) setting
mode
▪ Press and hold the control button for 6 seconds.
– The functions setting mode is active.
Step 2: Selecting Dual-pump Operation (DUAL)
▪ Turn the dial and select the required function.
▪ The symbol will light up.
DUAL
Step 3: Activating or de-activating Dual-pump Operation (DUAL)
▪ Press the control button.
NOTE
If 10 seconds pass without any settings being made or saved, the control unit will
revert to the previous settings.
7.3.4 Modbus
Function
All pump sets are slaves; they only respond to the Modbus master (external hardware
and software).
The pump set can neither be set nor operated as a Modbus master.
The send commands and receive commands comply with the requirements of the
Modbus RTU standard protocol.
NOTE
All Modbus data points can only be read (monitored) and input transmitted via
Modbus can only be received and processed when Modbus is activated. See
Overview of Modbus operating parameters.
CalioTherm Pro