Based on Immigration Rules Part 9:
Grounds on which entry clearance or leave to enter the United Kingdom is to be refused
- the fact that the person seeking entry to the United Kingdom:
- has been
convicted of an offence for which they have been sentenced to a period
of imprisonment of less than 12 months, unless a period of 5 years has
passed since the end of the sentence.
so if you have been sentenced to 6 months (this usually includes suspended sentences), unless it was more than 5 years ago you will be refused entry by default.
Note that for Tier 1 Visas you have to provide an overseas criminal record certificate from all countries you have been living in the past 10 years that will probably specify the exact details of your sentence.
Note that these are the generic conditions, so if you would still like to visit the UK on a Tier 1 Visa your best bet is to contact an immigration lawyer who should be able to advise you on your actual chances. Since your conviction is suspended they might still be able to help you in the process of applying, and probably tell the actual chances that your application will be granted.
Note that even if the immigration lawyer tells you that your sentence doesn't apply, and is non-custodial you still generally have to wait at least 12 months after the end of the original period for you to be eligible to apply:
Paragraph 320(18A) of the Rules states that an application should normally be refused if within the 12 months prior to the date on which the application is decided, the person has been convicted of or admitted an offence for which they receive a non-custodial sentence or other out of court disposal that is recorded on their criminal record.