Handbook OPTIMA S FC 202201

10/26 | OPTIMA-S-FC, Siemens Equipment
Accessory
AST20
Handheld Tool
AST20 is a handheld tool for VAV controllers and communicative actuators. The product enables the customer to
change the configuration of the VAV controllers (the parameters critical for the functionality of the device can be
modified only in OEM access level).
Configuration with AST20
Connection of AST20 to the VAV controller
1
2
4
5
3
AST20
i
Legend
1 RESET
2 ESCAPE
3 UP
4 DOWN
5 ENTER
Operation
The AST20 is operated by five keys.
• Keys UP (3) and DOWN (4) are used to navigate to a menu item.
• If pressing ENTER (5) on a highlighted menu item, the value can be changed with UP/DOWN (if not protected or
readonly).
• Pressing ENTER confirms the vaue change.
• By pressing ESCAPE (2), a value change can be cancelled or a menu page can be left to the next higher level.
• To reset the AST20, press RESET (1) until the display gets dark. The restart takes ca. 20s.