Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 51)

Programming
Chapter 3
3Ć8
This section defines the words and bits of the three write blocks and the
single read block. For ease of reference, the following word and bit
notation is used throughout the manual:
A PID module word is abbreviated as Wxx.
Example: Word number 12 = W12.
A PID module bit is abbreviated as Bxx.
Example: Bit number 07 = B07.
The word and bit abbreviations can be used together.
Example: Word number 12, Bit number 07 = W12 B07.
Other notations which will be used are (LE) and (XF). The symbol (LE)
is used to designate the four bits in the master control word which require
a load/enter sequence to occur before the PID module will accept a
change to them. The symbol (XF) is used to designate words or bits
which are used to select the Expanded Features of a loop.
For ease of reference, the parameter words required to program the
module are numbered consecutively in the following sections.
Section titled Dynamic Block: Words W01-W17.
Section titled Loop Constants Block: W18-W36 for loop 1,
W38-W56 for loop 2.
Section titled Status Block: W57-W74.
Dynamic Block: Words W01ĆW17
The dynamic block is a write block transfer file of up to 17 words. It is
used to establish the features of the PID module, to program the most
frequently changing (dynamic) parameters of loop 1 and loop 2, and to
load information required by the PID module for controlling the block
transfer sequences.
If loop 1 is selected, only words W01 must be programmed. If both loops
are selected, then the entire 17 word block must be programmed.
The 17 words of the dynamic block are defined in the paragraphs that
follow. Table 3.A lists the dynamic block words. All the words of the
Word and Bit Definitions