OM-121 11
Figure 3. LCD Display Format
10. Schedule #1
Sun 00:00-00:00
Menu Line
Item Line
Field
Password Protection
The MicroTech controller includes password protection to guard against the entry of inadvertent
changes. When you attempt to change the value of an adjustable parameter with the keypad, the
controller prompts you to enter the password. If the correct password is entered, the controller will
allow you to make changes as desired. Five minutes after the last keystroke is made, the controller
will disallow further changes until the password is re-entered.
The keypad password for all controllers is the following keystroke sequence: ENTER, ENTER, ENTER,
ENTER. It is not adjustable. See “Keypad Functions” below for more information.
Keypad Functions
The MicroTech controller’s keypad consists of 12 pressure sensitive membrane switches, which are
divided into 4 groups: “Category,” “Menu,” “Item,” and “Action.” See Figure 4. Following are
descriptions of these groups and the keys they contain.
Figure 4. Keypad
CONTROL
STATUS
SWITCH
ALARMS
CATEGORY
NEXT
PREV.
NEXT
PREV.
ENTER
CLEAR
MENU ACTIONITEM
DECR.
INCR.
Category Group
Acting like bookmarks in the menu structure, the keys in the Category group provide quick access to
the desired menus. By using these keys, you can minimize scrolling between menus with the keys in
the Menu group (see below). Refer to Figure 2.
Status Key: Any time the STATUS key is pressed, the first menu in the Status category is displayed.
This is menu 1, “RMC Status.”
Control Key: Anytime the CONTROL key is pressed, the first menu in the Control category is
displayed. This is menu 4, “Group Assign.”
Alarms Key: Any time the ALARMS key is pressed, the first menu in the Alarm category is
displayed. This is menu 17, “Units w/Alarm.” Note that when an alarm occurs, the display will
automatically switch to the “Units w/Alarm” menu. You can then use the SWITCH key to return the
display to whichever menu and item it was at before the alarm occurred.
Switch Key: The SWITCH key toggles the display between associated Status and Control category
menu items. It allows you to quickly check a controlled condition against its set point. For example,
by pressing SWITCH when the Group #1 static pressure is being displayed (“Group #1=” item under
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