Trane Engineered Smoke Control System Application Manual page 120

Chapter 7 Programming
108
Figure 58 illustrates how adding self-testing to the system affects
programming for damper control on each floor. The self-test request
becomes another source of damper/fan control, along with automatic and
manual override self-tests. The existence of the self-test signal is
indicated by the binary variable, "selfTestEnable". Once self-testing is
enabled, dampers and fans become controlled by a direction variable. The
variables, selfTestEnable and selfTestDirection, along with accompanying
switch logic are not necessary in non-dedicated systems.
Figure 58. Effect of AST on damper control
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