25Cascade via communicationSystems in which more than one heat pump is controlled via the communications portrequire both additional HPM(2) controllers as well as the proper adapter cable for theadditional second and third heat pumps. The HPM controllers must be connected viaan Ethernet/LAN switch (see figure, below). When loading the appropriate systemdiagrams, the functions will be automatically adapted in each controller and fixed IP-addresses will be issued.Fig. 2.20: cascade system with communication via BUSSystem diagram IP after loading the diagramHPM1 master controller HP1 6xxxx = 2WP7xxxx = 3WP 192.168.178.11 (as default setting)HPM2 slave controller HP2 80000 192.168.178.12HPM2 slave controller HP3 90000 192.168.178.13Table 2.1: Diagram / IP address in cascade systemAs the IP-address will be changed in the slave controllers, loading of the systemdiagram should take place before the controller is connected to the LAN switch.