Page 694 - Mechanical Engineers' Handbook (Volume 2)

1 Characteristics of General-Purpose Control Devices 685

Figure 6 Parallel sequence initiation and convergence.

+-----+--------------+-----+
---| a | b | c |
+-----+--------------+-----+
Figure 7 Action block: a, action qualifier; b, action name; c, feedback name.

Table 1 Action Block Qualifiers
Qualifier Explanation
None Nonstored (null qualifier)
N Nonstored
R Overriding reset
S Set (stored)
L Time limited
D Time delayed
P Pulse
SD Stored and time delayed
DS Delayed and stored
SL Stored and time limited
P1 Pulse (rising edge)
P0 Pulse (falling edge)