Rockwell Automation 1771-QB Linear Pos. - Manual (Page 137)

Advanced Features
Chapter 9
9-6
low for the specified duration when triggered to pulse
When an output changes to a high or low state, it is guaranteed to stay in
that state for a minimum of 16 milliseconds in order to be compatible with
the discrete inputs. Thus if two successive changes to an output are
initiated within 16 milliseconds of each other, the second change will be
delayed until the 16 millisecond interval has expired. If the second change
is a pulse, the duration of that pulse will also be shortened by the length of
the additional delay.
Figure 9.4
Programmable I/O Control Word
50089
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0
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Programmable
OUTPUT 1 pulse
duration:
INPUT 2 trigger:
00 = High level
01 = Low level
10 = Positive edge
11 = Negative edge
0 0
Normal/complement
(0/1) programmable
OUTPUT 1
Programmable
OUTPUT 2 pulse
duration:
Normal/complement
(0/1) programmable
OUTPUT 2
Programmable outputs
reset/fault state:
0 = Last state
1 = Reset
INPUT 1 trigger:
00 = High level
01 = Low level
10 = Positive edge
11 = Negative edge
OUTPUT 2:
0 = Loop Fault
1 = Programmable
OUTPUT 1:
0 = InĆposition
1 = Programmable
00 20 ms
01 50 ms
10 100 ms
11 200 ms
Bits 4 and 5 - OUTPUT 2 Pulse Duration
If OUTPUT 2 is configured to be programmable and motion segment
control word 2 specifies that OUTPUT 2 is pulsed when trigger conditions
are satisfied, these bits define the duration of the pulse to be 20, 50, 100 or
200 milliseconds.