93_PWMR.pm : ILookBackCnt, buffer holding previouse temperatures used for PID I-Part calculation
93_PWMR.pm : ILookBackCnt, buffer holding previouse temperatures used for PID I-Part calculationView Changes
Source: 93_PWMR.pm : ILookBackCnt, buffer holding previouse temperatures used for PID I-Part calculation (http://sourceforge.net/p/fhem/code/10770/)