Allen-Bradley 1747-PT1, Руководство пользователя

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Monitoring Controller Operations
Chapter 12
12–9
Control Data File (R6)
The display below show the control data file. The cursor is on the enable bit
EN (bit 15) of control element R6:0. The control word bits EN, EU, DN,
EM, ER, UL, IN, and FD (bits 15, 14, 13, 12, 11, 10, 9, and 8 respectively)
are all reset. The length is 25 and the position is 0.
F1 F2 F3 F4 F5
NEXT_PG PREV_PG ADDRESS NEXT_FL PREV_FL
Control R6:0
EN
EU DN EM ER UL IN FD
STATUS 0 0 0 0 0 0 0 0
PRESET 25
ACCUM 0
STATUS=0000000 RUN
To display the next consecutive data file – the integer data file, press [
F2
],
NEXT_FL.
Integer Data File (N7)
The display below shows the integer data file. Four elements are shown:
N7:0 through N7:3. The cursor is on N7:0, which currently has a decimal
value of 1098.
F1 F2 F3 F4 F5
NEXT_PG PREV_PG ADDRESS NEXT_FL PREV_FL
Address Data
N7:0 1098
N7:1 0
N7:2 2000
N7:3 5
N7:0=1098 RUN
To display the next consecutive data file, press [
F2
], NEXT_FL. If a data file
numbered 8 or higher has been used, the displays will change accordingly.
Otherwise, the HHT wraps around to the start of the data table and displays
the output data file.
This section illustrates how:
•
to monitor counter operation
•
to change counter preset and accumulator values
•
counter enable, done, and overflow bits operate
•
to reset a counter
The examples in this section are based on the count–up ladder diagram
shown on page 12–3. The count–up enable bit CU (bit 15), done bit DN
(bit 13), and overflow bit OV (bit 12) of the counter energize external
outputs 0, 1, and 2 respectively. External input 0 enables the counter;
external input 1 resets the counter.
Online Data Changes