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Apache PLC4X 0.8.0
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@chrisdutz chrisdutz released this 26 Jan 08:13
· 5415 commits to develop since this release
v0.8.0
ebd0d6c

This is an ordinary PLC4X release, containing changes that
accumulated over time. It doesn't have an explicit focus on
a particular topic.

New Features

  • The KNXnet/IP Driver now supports writing of values.
  • The Modbus driver now supports more common notations of
    Modbus addresses using a pure-numeric notation.
  • The ADS, KNX, Modbus, S7 and simulated drivers have been
    updated to support the IEC 61131-3 data-types.
  • We are now including PLC4Go as PLC4X implementation in
    the programming language Go(lang)
  • Integration with the Milo OPC UA Server is now available.
  • Kafka Connect workers have been updated source and sink connectors
    are now included.

Incompatible changes

  • The syntax of the S7 addresses changed slightly allowing to
    provide a string length. Without this, a STRING datatype will
    read 254 characters, by adding the size in round brackets to
    the type name will use the specified number.

    Examples:

    Read one String which is max 10 chars long:
    %DB2:30:STRING(10)

    Read an array of 3 Strings where each is max 10 chars long:
    %DB2:30:STRING(10)[3]

  • The PLCValue types have been refactored to align with the types
    defined in IEC 61131-3 (https://en.wikipedia.org/wiki/IEC_61131-3)
    directly using the older Java types (PlcBoolean) is no longer
    possible.

Bug Fixes

A lot of testing was done regarding the IEC 61131-3 data-types.
This resulted in numerous bugfixes in many protocols.

  • PLC4X-132 [S7] Communication to S7 PLC dies in some situations
  • PLC4X-206 When writing short values exceptions are thrown
    while preparing the write request.
  • PLC4X-207 No registered handler found for message TPKTPacket[],
    using default decode method - Communication with S7
    and Modbus device hangs
  • PLC4X-209 [S7] When writing INT and DINT values the Write
    operation fails with an internal error
  • PLC4X-210 [KNX] When running a KNX Tunneling Subscription
    for a longer time there are packets that kill
    the connection
  • PLC4X-211 PlcValues seem to always return "true" on the
    isXYZ" checks.
  • PLC4X-212 When writing multiple values in one request the
    item status is not correctly set
  • PLC4X-213 [Modbus] The Modbus driver doesn't handle error
    responses gracefully
  • PLC4X-214 [Modbus] Holding register addresses have an offset
    of 1 (Not reading the correct address)
  • PLC4X-215 Drivers using the BaseOptimizer
    (SingleFieldOptimizer) don't handle error responses
    gracefully
  • PLC4X-218 [Scraper] After stopping the scraper still the
    statistics are logged and the application doesn't
    terminate
  • PLC4X-239 Read DTL (Date and Time)
  • PLC4X-240 Protocol error in reading string
  • PLC4X-246 S7 driver hangs on read
  • PLC4X-245 [Modbus] Apache NiFi processor throws
    java.io.IOException after a while
  • PLC4X-255 Kafka Connector Source Task doesn't block within poll()
    resulting in high CPU usage.
  • PLC4X-261 Pooled connection manager returns a connection that isn't
    connected in some situations.
  • PLC4X-272 When splitting up large requests, too big sub-requests
    are generated (S7)
  • PLC4X-256 ReadBuffer truncate last byte of even small payloads
  • PLC4X-262 Error in reading Array
  • PLC4X-270 Ads driver does not accept double-digit array indexes
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