Publication 1766-RM001A-EN-P - October 2008
352
Process Control Instruction
Input/Output Ranges
The input module measuring the process variable (PV) must have a full
scale binary range of 0…16383. If this value is less than 0 (bit 15 set), then
a 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 greater
than 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 same
range of 0…16383. The Control Output (word 16 of the control block) has
the range of 0…100%. You can set lower and upper limits for the
instruction’s calculated output values (where an upper limit of 100%
corresponds to a Control Variable limit of 16383).
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