Siemens 6es7272 0aa30 0ya1 td 200 text display interface siemens 6es7272 0aa30 0ya1 the simatic td 200 unit is a text display interface for a s7 200 micro plc the unit has a 2 line 20 character display and an led backlight the display has the functionality to allow the user to also change parameters and set inputs and outputs the unit has 8 programmable keys for settings and configuration is easy using the step7 software via the rs 485 interface siemens 6es7272 0aa30 0ya1 td 200 text dis