It might affect your current PR application. Your PR application has expressed your intent to immigrate to Canada. Thus, if you apply for a nonimmigrant visa (visitor visa), this prior immigrant intent conflicts with the nonimmigrant intent needed to obtain a nonimmigrant visa to (and entry into) Canada. However, it is logical and possible to demonstrate that you have a future intent to immigrate but only wants to make a more immediate nonimmigrant entry. When applying for visitor visa, it is important that you are able to demonstrate your specific reason for applying for that visa.
You will need to explain clearly the purpose of your travel. If at any time you are questioned whether you or anyone has filed an application for you to immigrate, you should explain that you have filed for the PR application - which category. If you can demonstrate the purpose of your temporary entry, usually this is not an issue. However, failure to disclose this information could result in a finding of misrepresentation. A finding of misrepresentation may result in permanent ineligibility to enter Canada.