网上有手册，你自己看看。
http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objID=10805567&subtype=133300

Manuals,configurable TP 277, OP 277 (WinCC flexible)
Edition: 09/2007
Operating Instructions
Document identification number: A5E00471222-02
Part number of the documentation: 6AV6691-1DH01-0AB0
for products: 6AV6643-0AA01-1AX0; 6AV6643-0BA01-1AX0 2007-09-21
ID: 23335365
Manuals TP 270, OP 270, MP 270B (WinCC flexible) Operating Instructions
Edition: 03/2004
Document identification number: A5E00280664-01
Part number of the documentation: 6AV6691-1DD01-0AB0
for products: 6AV6545-0CC10-0AX0 2004-06-09
ID: 18796343
Manuals SIMATIC HMI Multi Panel MP 270B, Touch Panel TP 270, Operator Panel OP 270
Edition: 12/01
Equipment Manual
Document identification number: A5E00136825
Part number of the documentation: 6AV6591-1DC20-0AB0 2002-02-19
ID: 10420917