PLCcom for Modbus - Downloads and resources

Version 8.3.8 

• Bugfix: If a Modbus slave sends an error code to the master due to a write command, a NullPointer exception was triggered in the response

Version 8.3.6 

• Bugfix: When using non-optimized ReadRequestCollections, the SlaveId 1 is always transferred
• internal adjustments and improvements

Version 8.3.3 (nur .Net Version)

• Support for .net7 and .net8 
• Reference upgrade System.Io.Ports to version 8 (.Net version only)
• internal adjustments and improvements

Version 8.2.2

• Bugfix: Problem writing with Mask Write Register function (FC22)

Version 8.2.1 (.Net version only)

• Bugfix: No connection (Modbus Master) under .Net Core 3.1
• .Net Core code examples added

Version 8.1.1

• Support .Net 6 (only .Net version)
• Reference upgrade System.Io.Ports to version 6 (only .Net version)
• Support Java version 17 or openJDK17 (Java version only)
• Unlocking function codes 65 to 127 for user-defined functions
• Bugfix: Possible aborts of TCP connections when using .Net 5
• internal adjustments and improvements

Version 7.3.3 (.Net version only)

• Bugfix: Problems creating a TCP connection using .Net 5

Version 7.3.2

• Optimization of the timeout behavior in the event of connection interruptions
• Bugfix: Problems that may occur when TCP/IP packets are transmitted in split form
• various internal adjustments

Version 7.2.6 (.Net version only)

• Reference upgrade System.Io.Ports to version 5

Version 7.2.5

• Fix problem when using a non-optimized ReadCollection

Version 7.2.1

• Fix problem possibly high memory usage Modbus Slave

Version 7.1.1

• Support of the .Net 5.0 framework
• JRE/JDK at least version 8 or higher
• Fix problem fast simultaneous TCP request over multiple ports may cause problems and disconnections
• Fix problem possible connection aborts with asynchronous TCP transmission
• Nuget package available
• Framework Version mindestes 4.2
• internal improvements and revisions

Version 6.6.1

• Definition of the minimum period in milliseconds between two characters for RTU master instances
• Improvement of the TCP / IP connection stability

Version 6.5.1

• Specification of the slave ID now possible up to 255, before max. 247
• internal optimizations

Version 6.4.1

• get STRING datatype with byte order
• .Net version, new data type SByte (signed byte)
• Java version, new data type UByte (unsigned byte)
• Bugfix: Optimized internal speed

Version 6.3.1

• Bugfix: When writing individual coils, the following coil could also be written under certain circumstances

Version 6.2.1 (Java version only)

• Extension of the enum eFlowcontrol by the members RTSCTS, XONXOFF and RTSCTS_XONXOFF, in order to be able to transfer the handshake more comfortably when using a serail port

Version 6.1.2

• new Communication type RTU_over_TCP
• (.Net only) 'Readtimeout' property is deprecated, replaced by 'OperationTimeout'.
• (.Net only) property 'Connecttimeout' is deprecated, replaced by 'ConnectTimeout' (misspelling)
• (.Net only) CRC / LCR check can be enabled and disabled with the property 'CRCCheckEnabled
• (Java only) function getReadtimeout() is deprecated, please use function getOperationTimeout() instead
• (Java only) method setReadtimeout() is deprecated, please use method setOperationTimeout() instead
• (Java only) function getConnecttimeout () is deprecated because of misspelling, please use function getConnectTimeout () instead
• (Java only) method setConnecttimeout () is deprecated because of misspelling, please use method setConnectTimeout () instead
• (Java only) CRC / LCR check can be switched off on request for the Modbus master with new method/function boolean getCRCCheckEnabled() and setCRCCheckEnabled(boolean value)

Version 5.6.5

• identification flag for related requests

Version 5.6.0

• Bugfix: When reading (collection only) individual bits in the holding register

Version 5.5.0

• new function (override of auto-disconnect on timeout)

Version 5.4.1

• Parameter to limited the PDU length

Version 5.3.0 (Java version only)

• (Java only) Bugfix: Error reading more than 63 registers in a call

Version 5.2.0

• Option to enable or disable diagnostic log

Version 5.1.0

• official support from “Encapsulated Interface Transport” FC43 / MEI 13
• internal improvements in terms of speed and stability
• memory leak while bad connection (logging)

Version 4.7.0

• Bugfix: Double error message -19

Version 4.6.0 (Java version only)

• (Java only) Bugfix: Reading Collections Holding Register from address 63

Version 4.5.0 (Java version only)

• (Java only) Bugfix: Read/ Write floats and doubles
• (Java only) Bugfix: ReadrequestBuilder from address 32

Version 4.4.0

• memory delete when reading a read collection

Version 4.3.5

• from this version compatible to JRE7 and JRE8

Version 4.1.0

• internal optimization for faster data access
• Bugfix: Display of the wrong address when reading bytes

Version 3.3.3

• Bug fix for DNS and IPV6 problems

Version 3.3.2

• Bugfix: Error message at very fast successive requests in the Modbus Slave fixed

Version 3.2.1

• Bugfix: Sequence-Error at telegram 256 in Modbus Slave

Version 3.1

• Provisioning “PLCcom for Modbus” Version 3