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FxSerialMaster

Purpose​

FxSerialMaster reads and writes Mitsubishi FX programming-port addresses and exposes the PLC activation command.

Open the plugin​

Enter "Development Configuration → Collection Configuration", create a device and select "FxSerialMaster" in "Collection Plugin".

Supported channels and data types​

Channel typePre-configuration check
Serial PortConfirm that the serial port is not occupied by other programs and maintains the same baud rate, data bits, stop bits and parity bits as the device.
TCP ClientConfirm network reachability of the device IP, port, and gateway to the device.
TCP serverConfirm that the local listening address and port are available, and allow on-site devices to actively connect to the gateway.

Optional data types: Boolean, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, Float, Double, String, Decimal

Plugin properties​

Protocol parameters​

SettingDescription
Use the new version of programming port commands and address mappingDefault: Yes; fill in: switch. Controls whether the "Use new version of programming port commands and address mapping" function is enabled.

Address rules​

  • FX Serial WORD device area: D, TN, CN.
  • FX Serial bit device area: M, S, X, Y, TS, TC, CS, CC; X and Y are analyzed in octal.
  • A maximum of 254 raw bytes can be transferred in a single frame; Boolean block write address and length must be on a 16-point boundary.

Special methods​

MethodPurposeParameters
ActivePlcAsyncActivate PLCNo parameters

Functions​

FunctionPurpose
Read and writeRead confirmed WORD or bit addresses and write only approved test points.
Activate PLCSend the PLC activation command. This changes controller state and is a high-risk operation.
MessagesInspect programming-port requests, responses, and errors in the debug log.

Device debug​

Enter "Development Configuration → Collection Configuration", select the current device and click "More Functions", then open "Debug".

Dedicated debugging page​

Use the common read/write debug page for address checks. The FxSerialMaster-specific panel exposes only Activate PLC.

FxSerialMaster protocol debugging

Debugging notes​

Check the PLC type first; activating PLC is a high-risk control and must be confirmed twice before execution.

Verify the configuration​

  1. Read a known WORD address such as D100 and compare it with the PLC programming software.
  2. Read a bit address such as M0; verify X and Y addresses using octal numbering.
  3. For a Boolean block write, use a safe test area and confirm that the start address and length are both aligned to 16 points.
  4. Run Activate PLC only during an approved maintenance window after confirming that the field procedure allows it.

Troubleshooting​

  • Address read has no response: Check the serial or transparent-TCP settings and confirm that the new command/address mapping option matches the PLC series.
  • X or Y address is wrong: Recheck that the address is interpreted as octal, not decimal.
  • Boolean block write fails: Confirm 16-point alignment for both the start address and length.
  • PLC activation fails: Confirm that the controller supports the command and that its current state allows activation; inspect the device response.
  • The serial port device does not respond: Confirm that the port is not occupied and that baud rate, data bits, stop bits, and parity match the PLC.