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Other Features
Restoring factory defaults (Erases all user entered data)
To re-set the MCU901 unit back to the factory defaults, navigate to the "Load Defaults" screen and press the ENTER key twice.
PIN Security
Personal Identification Number (PIN) security prevents unauthorised people from programming the MCU901 control unit.
Typically, this is set-up when all the other programming has been completed. As with Bankcards, there is one PIN number.
The factory default is for PIN security to be inactive. To activate, navigate the menu system to the PIN screen and edit a 4-digit
personal identification number (PIN) that you want. The PIN is edited with the arrow keys and confirmed with the ENTER key;
the 4-digit PIN will then be replaced by "- - - -" to indicate that PIN security is active. (By default, PIN is a 0 if inactive).
Once PIN security is activated, a prompt for the PIN will appear when needed for an activity, such as starting a Wizard. If
correctly entered, no further PIN requests are made unless the "Cancel Password" option is selected from the MAIN MENU
screen. This menu option appears only after correctly entering the PIN; the option disappears when selected, therefore making
the MCU901 secure and prompt for the PIN when needed.
Modes of operation
There are two operating modes for the MCU901. They are on-line and off-line.
An open padlock icon indicates the MCU901 is presently in the off-line mode. In this mode, the unit can be
programmed providing that you know the security PIN (if set-up). Additionally, the 4-20mA output and all relays
are frozen.
A closed padlock icon indicates that the MCU901 is presently in the on-line mode. In this mode, most of the unit
cannot be programmed. However, you will be prompted to go off-line if you attempt to programme whilst in this
mode and providing that you know the security PIN (if set-up). Additionally, the 4-20mA output and all relays are
not frozen.
(IP2040/QS)
Navigating to the LOAD DEFAULTS Screen
Navigating to the PIN set-up screen
14
January 2006
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