Serial Port - ASCII configuration page

Use the ASCII configuration page to do the following actions:
  • Configure the common ASCII channel settings.
  • Configure the ASCII channel protocol control settings.
The displayed configuration settings vary with the
Micro800
 controller selection.
ASCII configuration settings
Setting
Description
Common Settings
Baud rate
Lists the baud rate in bits per second. Options are:
  • 1200
  • 2400
  • 4800
  • 9600
  • 19200
  • 38400
The default value is 19200.
Parity
Lists the parity bit usage in the communication packets. Options are:
  • None
  • Odd
  • Even
The default value is None.
Protocol Control
Media
Specifies the supported media types. Options are as follows:
  • RS232
  • RS485
When
Media
 is set to
RS485
,
Control line
 is defaulted to
No handshake
.
Control line
Lists the control line communication options. The options are available when
Media
 is set to
RS232
.
When
Media
 is set to
RS485
,
Control line
 is defaulted to
No handshake
.
  • No handshake
     - Selected for direct point-to-point communication without a modem. When selected, the following options are not available:
    • RTS pre-delay
    • RTS post-delay
  • Full-duplex (RTS always on)
     - Selected when used with modems. When selected, the following options are not available:
    • RTS pre-delay
    • RTS post-delay
  • Half-duplex without continuous carrier (RTS/CTS)
     - Selected when both the master and slave are using half-duplex modems. When selected, the following options are not available:
    • XON/XOFF
    • Echo Mode
The available options for L20E, L50E, and L70E controllers are as follows:
  • RS232 No handshake
  • RS232 Full-duplex (RTS always on)
  • RS232 Half-duplex without continuous carrier (RTS/CTS)
  • RS485 No handshake
Deletion mode
Lists the options for the ASCII delete character. The mode affects the characters that are echoed back to the remote device.
  • In the
    CRT
     mode, when encountering a delete character, the
    Micro800
     controller echoes three characters to the device: backspace, space, and backspace. This covers the previous character on the terminal.
  • In the
    Ignore
     mode, the previous character is removed from the receive buffer.
    Ignore
     is the default option.
  • In the
    Printer
     mode, when encountering a delete character, the
    Micro800
     controller echoes the slash character, and then echoes the deleted character.
Data bits
Specifies the number of bits of data per character. Options include
7
 and
8
. 8 is the default option.
Stop bits
Specifies the number of stop bits per character. Options include
1
 and
2
. 1 is the default option.
Append chars
Specifies the append characters that are defined for the ASCII protocol and used for transmitting. The range is from zero through two-hexadecimal values, separated by a comma.
0xFF
 is reserved and can be used to signify no characters. For example:
  • 0x0D,0x0A - 2 characters, the default value
  • 0x0D,0xff - 1 character
  • 0x0D - 1 character
  • 0xff,0xff - no characters
  • 0xff - no characters
  • blank - no characters
Termination chars
Specifies the termination characters that are defined for the ASCII protocol and used for receiving. The range is from zero through two-hexadecimal values, separated by a comma.
0xFF
 is reserved and can be used to signify no characters. The default value is
0x0D,0x0A
.
XON/XOFF
Turns on or turns off the XON/XOFF function. It is turned off by default.
Echo mode
Turns on or turns off character echo.
When turned on, all received characters are echoed back to the computer running
FactoryTalk Design Workbench
. When the
Micro800
 controller is connected with a terminal, you can view the entered characters.
It is turned off by default.
RTS pre-delay
Specifies the delay period before requesting a transmission.
The value is from 0 through 32767, with each unit increment representing 20 milliseconds. The default value is 0.
RTS post-delay
Specifies the delay period after requesting a transmission.
The value is from 0 through 32767, with each unit increment representing 20 milliseconds. The default value is 0.
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