The RMC SERIAL module adds a single serial port to the RMC for communications with other devices such as HMIs and PLCs. However that one serial port has a great amount of flexibility. It supports most standard serial port options (e.g. baud rate and parity), several protocols, and several line drivers with their associated options (e.g. flow control, termination, and biasing).
These settings are changed through RMCWin and saved in the RMC CPU's Flash memory. To change these settings:
On the Tools menu, click Module Configuration.
In the Slots list, click the Serial line.
Click Slot Options.
In the Serial Module Options dialog box, make all changes.
Click Update RMC.
This step will save the settings to Flash memory.
The Update Module Configuration dialog box will be displayed to indicate the progress. If the RMC could not be reset automatically, you may be prompted to remove power and reset the RMC manually.
In the RMC Configuration dialog box, click Close.
The following options are available in the Serial Module Options dialog box:
Protocol: Select the protocol supported by your master device. The Test Mode protocol is a special one used to test the communications. With this protocol, for each character the RMC receives, it will add one to it and respond with that character. For example, if you send the character A, it will respond with B. This can be used from HyperTerminal included in Windows 98/NT/2000/Me/XP.
Serial Port Settings: The follow settings define how data is sent over the wire:
Note: Some of these options may be disabled depending on which protocol was selected. For example, many protocols require eight data bits, and as such seven data bits is not available when these protocols are selected.
Baud Rate: Select the baud rate from 9,600 to 115,200. This must match the other device(s) on the network.
Data Length: Select seven (7) or eight (8) data bits. Most protocols require eight data bits. This must match the other device(s) on the network.
Parity: Select which type of parity error checking you want to include. This must match the other device(s) on the network.
Line Driver: Select the line driver you wish to use. For further details on the line drivers, see Line Drivers: RS-232/422/485.
Each line driver also offers advanced settings. These are described below:
Advanced RS-232 Settings: The type of Flow Control can be selected. If None is selected, then no flow control is used. If Hardware (RTS/CTS) is selected, then the RTS and CTS lines on the serial cable are used to control when a device can send data to avoid overflowing the receiver's buffer. This option is most often not used, as the protocols keep the packet sizes small to avoid overruns. This setting must match in both devices.
Advanced RS-422/485 Settings: This option allows enabling and disabling the biasing and termination circuits for the receiver and transmitter circuits (4-wire) or transceiver circuit (2-wire). These options are described in detail in RS-422/485 Termination and Biasing.
Protocol-Specific Settings: Depending on the protocol selected, additional options may be available under this heading. The most common setting is a node address. See the appropriate protocol-specific help topic for details:
Using the Mitsubishi Bidirectional Protocol with the RMC SERIAL
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