user manual

Page 19
MSL600
Installation, Operation & Maintenance Manual
IP262/Z0, Rev. AB
February 2012
4.4 Security
The HMI includes a password system which may be used to protect parameters from unauthorised changes and
also to prevent the system from being switched between On and Off-line mode.
The password is in the form of a 4-digit code (or PIN). When the user has entered the correct PIN then the
password is said to be open (else closed). The PIN is a 4-digit code, value 0000 to 9999.
Once the password is open then all parameters may be edited.
A PIN of 0000 means that the password is disabled, i.e. no password is required to edit parameters.
Examining the PIN locally shows “- - - -” unless set to 0000.
When prompting for entering of PIN, the display shows “- - - -”.
A PIN is set or entered by scrolling each of the 4 digits using the m and o arrows to select the digit and n and p
arrows to select the value for each digit.
No PIN is required to navigate the menus or to simply examine parameter values.
Attempting to change a parameter value prompts for the entering of the PIN (if it is not already open). If the
parameter affects outputs, and if On-line, then after entering the PIN the user is offered go Off-line.
If the password is open then the main menu offers the option “Cancel Password” as the default (highest priority)
option. Closing the password does not affect the On line/Off-line status.
The password is automatically closed after 5 minutes without any key press; this does not affect the
On line/Off-line status.
4.5 On-line/Off-line
This feature allows the MSL600 outputs, i.e. its relays and current output to be frozen. Also, when On-line, the
editing of all parameters which may affect these outputs is inhibited.
Off-line inhibits relays and current output.
On-line inhibits the editing of all parameters that may affect the outputs. These include relay, current output and
alarm parameters.
The On line/Off-line state is shown by the padlock symbol at the top left-hand corner of the HMI display (padlock
closed represents On-line).
Go On line/Off-line by selecting the appropriate item in the main menu. As the mode is toggled, a large image of
the Padlock symbol opens and closes. Attempting to edit any parameter can only be performed with the unit
Off-line.
If the system password is closed then the system will prompt for a password, once correctly entered then it
changes as requested.
NOTE: There is no time-out on On-line or Off-line.