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SAFECONF configuration software
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4-5
4.4 Safe functional blocks and functions
The PSR-TRISAFE-S safety module is configured in the SAFECONF configuration software
by graphically connecting prepared safe functions and safe functional blocks.
Figure 4-2 Safe functional blocks in the toolbox (excerpt)
The connections are made intuitively using the mouse, and the editor prevents
impermissible connections (e.g., between certain outputs).
The safe functions include simple Boolean operations and basic functions used in standard
digital technology.
Safe functions The following safe functions are available in the SAFECONF toolbox and can be easily
added to the safety logic using drag & drop (in alphabetical order):
– AND (Boolean ANDing)
– EQ (Boolean comparison)
– F_TRIG (detection of a falling edge)
– NOT (complement or negator)
– NOT_EQ (comparison for Boolean inequality)
– OR (Boolean ORing)
– PULSE_GEN (safe pulse generator)
– R_TRIG (detection of a rising edge)
– RS (bistable function: priority for resetting)
– SR (bistable function: priority for setting)
– TOF (timer for off delay)
– TON (timer for switch-on delay)
– TP (impulse encoder)
– XOR (Boolean EXORing)
Safe functional blocks The safe functional blocks provide basic safety-related functions for implementing the
required safety circuits. Table 4-1 lists the available functional blocks in alphabetical order.