IFM Electronic AC402S, Руководство по программированию

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SmartPLC SafeLine AC4S with fieldbus interfaces
79
8.4 Use safety functions of CODESYS
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3S provide several libraries in the programming environment CODESYS Safety. They contain certified
function blocks (FB) by means of which the programmer can create safe applications for the fail-safe
PLC of AC4S. The libraries are automatically loaded during the creation of a safety project by means
of AC4S (
→
Create new project with AC4S (
→ S.
16 )). The user can access the elements of the
libraries via the library manager in the safety extension area of the device tree.
Following libraries are available:

SafetyStandard library (
→ S.
79 )

SafetyPLCopen library (
→ S.
80 )

SafetyFSoEMaster library (
→ S.
81 )
>
8.4.1 SafetyStandard library
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The library SafetyStandard.lib provides safe versions of standard functions (counters, timers,
triggers, bistable functions). The library contains the following functions:
Function block Description
SF_RS Safe bistable function block with dominant setting
SF_SR Safe bistable function block with dominant resetting
SF_CTD Safe counter (down)
SF_CTUD Safe counter (up)
SF_TOF Safe timer with switch-off delay
SF_TON Safe timer with switch-on delay
SF_TP Safe timer with clock generator
SF_F_TRIG Safe trigger with falling-edge detection
SF_R_TRIG Safe trigger with rising-edge detection
The developer is responsible for the use of the safety standard function blocks provided in
CODESYS.
► Observe availability of the FBs (→
Supported program organization units (POUs)
(
→ S.
73 ))!
The complete documentation of the
SafetyStandard.lib
can be accessed via the online
help of CODESYS Safety:
→ Online help > Add-Ons > CODESYS Safety > Libraries > SafetyStandard