I managed to get a CF card adapter from ebay, its an adapter which accepts a standard mmc card, cost me about £20 and i used it to reflash the firmware on a PV550 only a couple of weeks ago.
Thanks a lot for all kind reply.
Can I ask you guys that you just use memeory card to transfer programme or reflash firmware? If so, why not use cable connecting to RS232 printer port to download?
Nowadays it is difficulty to buy a small CF card I think. 2GB card is the smallest?
Had to use memory card to reflash firmware because PV wouldnt communicate with computer, but you can also transfer program using CF, the CF adapter i had accepts MMC's and i have alot of 128mB cards that are used for other PLC's.