Issues

• [Bug]: [Modbus] Support UDINT with least significant register first (little-endian word order)

  apache/plc4x#2837 · Filter by author Balaji-Sundar opened on Oct 28, 2026

• [Bug]: [Modbus TCP] Connection-level unit-identifier is not applied to read requests

  apache/plc4x#2836 · Filter by author Balaji-Sundar opened on Oct 28, 2026

• [Bug]: TagBatch reuses a cached PlcReadRequest bound to a closed connection, so fetches fail after the first and never recover after a PLC restart

  apache/plc4x#2832 · Filter by author etzel-mes opened on Oct 23, 2026
  

• [Bug]: OPC-UA driver 1.0.0 fails against a certificate-less server even with security-policy=NONE (regression vs 0.13.1)

  apache/plc4x#2830 · Filter by author iscmcloud opened on Oct 22, 2026
  

• [Bug]: OPC UA UserNameIdentityToken sends length+password+nonce instead of the plain password when token security policy is None

  OPC-UA
  Bug

  apache/plc4x#2791 · Filter by author tmxhfwl opened on Oct 2, 2026
  2

  

• [Bug]: AdsTcpConnection sendAmsRequest throws away userdata

  ADSjava
  Bug

  apache/plc4x#2758 · Filter by author boecko opened on Sep 16, 2026

• When subscribing to the OPcUaServber, the PlcProtocolException exception occurs frequently

  javaOPC-UA
  Task

  apache/plc4x#2753 · Filter by author doveylovey opened on Sep 15, 2026

• Expose the per-tag cause on PlcTagResponse, not just a bare PlcResponseCode

  Feature

  apache/plc4x#2744 · Filter by author chrisdutz opened on Sep 11, 2026
  3

• [Bug]: eip.mspec formation

  Ethernet/IPjava
  Bug

  apache/plc4x#2733 · Filter by author parallelbgls opened on Sep 6, 2026
  5

• [Feature Request]: Revive the .NET port (plc4net) — net8.0, SPI3 alignment, driver runtime

  working on it
  Feature

  apache/plc4x#2655 · Filter by author TomNewChao opened on Jul 26, 2026
  2

• [Feature Request]: Contribution proposal: read-only SLMP (MELSEC-Communication 3E) driver

  Feature

  apache/plc4x#2585 · Filter by author LivingLikeKrillin opened on Jun 4, 2026
  6

• [Feature Request]: show the name of PLC in logged warnings

  java
  Feature

  apache/plc4x#2495 · Filter by author makerMcl opened on Mar 18, 2026
  1

• [Feature Request]: better error message when data-content doesn't mach data-spec in S7

  javaS7
  Feature

  apache/plc4x#2377 · Filter by author DvonHolten opened on Dec 4, 2025
  2

• [Feature Request]: Secure ADS with Beckhoff ADS PLC

  ADSjava
  Feature

  apache/plc4x#2173 · Filter by author UserwithnoUsername opened on Jul 13, 2025
  14

• [Feature Request]: Modbus: Support for Word Swap

  javaModbus
  Feature

  apache/plc4x#2059 · Filter by author IsmoLeszczynski opened on Apr 24, 2025
  6

• [Feature Request]: omron finstcp/insudp protocol support

  Feature

  apache/plc4x#2049 · Filter by author boyucjz opened on Apr 2, 2025
  7

• [Feature Request]: S7CommPlus Support

  javaS7
  Feature

  apache/plc4x#2003 · Filter by author qoomon opened on Feb 5, 2025
  4

• [Feature Request]: EtherNet/IP Implicit Messaging is supported ?

  Ethernet/IPjava
  Feature

  apache/plc4x#1940 · Filter by author nqduy35 opened on Dec 17, 2024
  2

• [Task]: Port back the advancements in the Go version of the KNX driver back to Java

  gojavaKNXnet
  Task

  apache/plc4x#1691 · Filter by author chrisdutz opened on Jul 5, 2024

• [Feature Request]: support for IEC61850

  java
  Feature

  apache/plc4x#1551 · Filter by author lucamaf opened on Apr 22, 2024
  3

• [Feature Request]: Implement OPC-UA connection level discovery aside of main driver logic

  javaOPC-UA
  Feature

  apache/plc4x#1520 · Filter by author splatch opened on Apr 12, 2024
  

• [Feature Request]: Support for software/hardware timestamp information in CANopen driver

  CANopenjava
  Feature

  apache/plc4x#1471 · Filter by author splatch opened on Mar 27, 2024
  1

  

• [Feature Request]: Update CANopen driver to rely tag config options

  CANopenjava
  Feature

  apache/plc4x#1470 · Filter by author splatch opened on Mar 27, 2024
  

• [Feature Request]: Support TC2 (Was: [Bug]: Invalid tag item type from old Beckhoff)

  ADSgo
  Feature

  apache/plc4x#1424 · Filter by author RuneRoven opened on Feb 25, 2024
  8

• [Feature Request]: SNMP Driver Support

  java
  Feature

  apache/plc4x#1414 · Filter by author digga106 opened on Feb 19, 2024
  2