This may help

Quote Originally Posted by Serial Communicator MCS Help file
Parse Control Characters

When enabled, the parse control characters option enables you to send control characters in your message, using either a decimal or hexadecimal notation. For example, if you want to send hello world followed by a carriage return and line feed character, you would use hello world#13#10 for decimal, or hello world$D$A for hex. Only numbers in the range 0 to 255 will be converted. For example, sending the message letter #9712345 will be interpreted as letter a12345.

If the sequence of characters does not form a legal number, the sequence is interpreted as normal characters. For example, hello world#here I am. If you don't want characters to be interpreted as a control sequence, but rather send it as normal characters, then all you need to do is use the tilda symbol (~). For example, letter ~#9712345 would be sent as letter #9712345.