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APPLIC ATION DESCRIPTIONS AND ADDITIONAL INFORMATION 261

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PLC training and support

Application notes

Triggering safety actions using standard HMI Cyclic non-safe data exchange between the
The application note describes the AC500/ SM560-S safety CPU and the PM5xx non-safety
AC500-S system configuration, programming CPU
approach, safety calculation and requirements This application note describes the project
for standard HMIs for triggering safety actions configuration, programming details as well as
using them. Standard HMIs that support at least verification and validation steps for the optional
two different Ethernet-based communication use of cyclic non-safe data exchange via DPRAM
protocols can be used. ABB recommends Modbus between the SM560-S safety CPU and PM5xx.
TCP and ABB ETH. A mean time between failures A fast communication and/or transfer of large data
(MTBF) greater than 22.5 years is required for volumes (> 84 Bytes) via DPRAM between the
standard HMIs to satisfy PL d (ISO 13849-1) SM560-S safety CPU and the PM5xx non-safety
requirements. HMIs with lower MTBFs may only CPU is needed in some customer-specific appli-
satisfy PL c (ISO 13849-1) requirements. cations such as cranes, hoists, AGVs (automatic
guided vehicles), etc. to synchronize process data
AC500-S safety I/O DX581-S with ABB safety on both CPUs. The solution described in the
relays BSR23 application note with SF_CYCLIC_PM5XX_S_SEND
The application note provides technical details on and SF_CYCLIC_PM5XX_S_REC FBs allows data
using the DX581-S safety I/O module with ABB exchange with up to 2 kByte of process data
BSR23 safety relays for the potential-free switch- between a safety CPU and a non-safety CPU in
ing of 6 A / 5A (24 V DC / 250 V AC) electrical every program cycle.
loads, such as big safety contactors or safety
valves by means the AC500-S safety PLC. Typical For more information, please visit
wiring examples and information related to https://new.abb.com/plc/programmable-logic-
safety calculations are included. Explanations of controllers-plcs/ac500-s
using the PLCopen safety FBs delivered with the
AC500-S safety PLC in the safety application https://new.abb.com/plc/documentsanddown-
program to supervise the state of safety relay loads
contacts are provided.

Using DX581-S safety digital outputs with
2A 24 V DC electrical loads
The application note describes how the DX581-S
safety I/O module developed for electrical loads
with up to 500 mA 24 V DC can be used for
switching 2A 24 V DC electrical loads such as big
safety power contactors or solenoid valves. Details 08
for wiring, channel configuration and safety
calculation are provided.