1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

352 Process Control InstructionInput/Output RangesThe input module measuring the process variable (PV) must have a fullscale binary range of 0…16383. If this value is less than 0 (bit 15 set), thena value of zero is used for PV and the “Process var out of range” bit is set(bit 12 of word 0 in the control block). If the process variable is greaterthan 16383 (bit 14 set), then a value of 16383 is used for PV and the“Process var out of range” bit is set.The Control Variable, calculated by the PID instruction, has the samerange of 0…16383. The Control Output (word 16 of the control block) hasthe range of 0…100%. You can set lower and upper limits for theinstruction’s calculated output values (where an upper limit of 100%corresponds to a Control Variable limit of 16383).Publication 1766-RM001A-EN-P - October 2008