MMPL

Dear All, We have Installed Honeywell PTZ Camera in my Factory. We have total 4 ptz camera. I have set tour for all camera. Three camera tour is working fine but 1 camera tour is not working properly. The tour auto stops after 15-20 minute for 5-10 minutes and after that it work again for another 15-20 minute. this thing occurring continuously... Any one can help me in this... Thanks in advance...