You can call desired pre-positions (PTZ) of Bosch IP cameras by using OSRD protocol or BiCom protocol. Please check this aticle to find some examples and detailed explanation.
Using the following command you can reset the result of People counting via SDK: http://<IP_address>/rcp.xml?command=0x0b4a&type=P_OCTET&direction=WRITE&num=1
First recommendation would be to configure the mode for IVA as a trigger, setting IVA as Profile 1 for “trigger off” and IVA as silent for “trigger on”.