Entering an Input String at a Keypad for Use in PE
Programs
From a keypad connected to an ACX 57xx door, you can also send
additional data to the controller, which in turn passes it to a Plain
English (PE) program for execution in an Andover Continuum control
application. This enables you to use the keypad to send input to a PE
program for any purpose.
For example:
z
You can enter a string that a PE program uses to turn lights or fans
on or off, or to control other HVAC equipment.
z
You can enter a string indicating a user’s purpose for entering an
area. The PE program captures this information as input to a PE
program in order to track reasons for activity in a secure area.
Handling String Input at the ACX 57xx Controller
Before you can use the keypad for PE program input, you must create a
Plain English program that processes the string entered at the keypad
and returns a value to the system based on the entry. The ACX 57xx
door contains two attributes that are used by the PE program:
z
KeypadString door attribute — Your PE program reads this
attribute to obtain the content of the string entered at the keypad.
z
KeypadCommand door attribute — Your PE program sets this
numeric value to provide feedback via the reader/keypad LEDs to
the person entering code about the status of the operation. Other
commands are sent to the door via the KeypadCommand
attribute, such as enabling or disabling Keypad Input.
