Setting COMx - Online Access¶
By default, the serial interfaces are set to ‘Online access’. That means the access is done with help of Automation_Builder.
If the default mode is set to another value, the interface protocol is directly set in the PLC configuration. No block (such as MODINIT, COMINIT) is required.
The serial interface settings can be read in online mode using the PLC browser commands “com settings” and “com protocols” AC500-Specific PLC Browser Commands.
Configuration
Double-click COMx_Online_Access to open the COMx - Online Access Configuration in the editor window.
The following parameters are available:
| Parameter | Default value | Value | Meaning |
|---|---|---|---|
| RTS control | Telegram | None | No RTS control (direction control, not for PM55x and PM56x). |
| Telegram | RTS control activated (absolutely necessary for programming via RS-485!). | ||
| RTS/CTS (DTE<->DTE) | RTS and CTS signals are controlled to simulate a DTE device at the PLC communicating with a DTE device. | ||
| RTS/CTS (DTE–>DCE) | RTS and CTS signals are controlled to simulate a DTE device at the PLC communicating with a DCE device. | ||
| RTS/CTS (DCE<–DTE) | RTS and CTS signals are controlled to simulate a DCE device at the PLC communicating with a DTE device. | ||
| Baudrate | 19200 | 300 1200 4800 9600 14400 19200 38400 57600 115200 125000 187500 |
Transmission speed in Baud/s. |
| Parity (read only) | None | None | Parity setting for the Online Access. This parameter is read-only (not editable). |
| Data bits (read only) | 8 | 8 | Number of data bits. This parameter is read-only (not editable). |
| Stop bits (read only) | 1 | 1 | Number of stop bits. This parameter is read-only (not editable). |
| Run on config fault | No | No | The PLC program is not executed if there are faults in configuration. |
| Yes | The PLC program is executed even if there are faults in configuration. |
The serial interface settings must match the settings for the serial gateway driver. Refer to the description for programming via the serial interfaces Programming and Testing.