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Introduction to Applicative System Redundancy (ASR)

Introduction to Applicative System Redundancy (ASR) Available with AXC F 2152 and AXC F 3152 The Applicative System Redundancy (ASR) is carried out by providing two redundant PLCs (First and Second) in the same network together with the responding I/O stations. The communication between the PLCs and the I/O stations is based on the PROFINET… Read More

Function block for gathering SNMP values from managed switches

Function block for gathering SNMP values from managed switches Available with AXC F 2152 and AXC F 3152 General concept By means of this function block, SNMP values from managed switches with up to 8 ports can be read directly by the PLC via the SNMP protocol.  arrPartnerList The IP addresses… Read More

Function blocks for data synchronization

Function blocks for data synchronization Available with AXC F 2152 and AXC F 3152 General concept At the Applicative System Redundancy, the same application program is in operation on the two redundant PLCs (First PLC and Second PLC) but only one PLC (either First or Second) controls the process. By means of the ASR_ContrRed_2152 or… Read More

Function block for controller redundancy

Function block for controller redundancy Available with AXC F 2152 and AXC F 3152  This topic describes the redundancy feature for use with PLCnext Control AXC F 2152 or AXC F 3152 on an applicative base.  Note: For hardware-based redundancy with a pair of PLCnext Control RFC 4072R, see System redundancy with RFC 4072R. General concept The communication between the two PLCs necessary for controller… Read More

Engineering software for applicative-redundant systems

Engineering software for applicative-redundant systems Configuring the IP addresses with PLCnext Engineer The PROFINET system redundancy needs to be activated and parameterized. For a detailed description on how to do this, see Configuring the IP settings.  Activate PROFINET system redundancy       A Select Redundancy type… Read More

Function block for gathering port states from Axioline F PROFINET bus couplers

Function block for gathering port states from Axioline F PROFINET bus couplers Available with AXC F 2152 and AXC F 3152 General concept By the means of this function block the port states from PROFINET bus couplers of the type AXL F BK PN TPS can be read directly by the PLC via PROFINET… Read More

Configuring PROFINET devices for redundancy

Configuring PROFINET devices for redundancy Available from 2022.0 LTS with RFC 4072R Configure the System redundancy data hold time for each PROFINET device.  The System redundancy data hold time is the maximum time that the PROFINET device holds the output data while a switch-over of the redundancy roles takes place. If neither… Read More

System redundancy error codes

System redundancy error codes Available from 2022.0 LTS with RFC 4072R The most recent status or error message is indicated as a digit, visible in the PLCnext Engineer at the RDNCY_ERROR system variable. This is how to decode and handle the messages:  Digit Status or error message Description Remedy 1 OwnRdncyTypeChanged… Read More

System redundancy with RFC 4072R

System redundancy with RFC 4072R Available from 2022.0 LTS with RFC 4072R The RFC 4072R is a high-availability PLCnext Control with redundancy functionality. Some commissioning steps differ from those for other PLCnext Control devices. In the course of the system redundancy with RFC 4072R, we describe only these differences. Creating a new RFC 4072R project In PLCnext Engineer software,… Read More

IP addresses at redundant controllers

IP addresses at redundant controllers Available from 2022.0 LTS with RFC 4072R Understanding the structure of IP addresses In redundancy mode, the preset IP addresses are used as the system IP address of the respective Ethernet interface. The process-leading controller (= PRIMARY controller) can additionally be reached via the system IP… Read More