Emerson FXMP25 User's Guide Page 28

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28 FXMP25 User Guide
www.controltechniques.com Issue Number: 3
A single up key action when the last parameter is being displayed will cause the
parameter number to roll over to the lowest parameter available in the current mode.
Similarly holding the down key will cause the parameter number to decrement until
the lowest parameter available is reached and a single down key action will cause
the parameter number to roll under to Pr 99. Pressing and releasing the Mode key
again will change the display from parameter view mode to parameter edit mode.
In parameter edit mode, the right hand display flashes the value in the parameter being
shown in the left hand display.
Pressing the MODE key in parameter edit mode will return the controller to
parameter view mode. If the MODE key is pressed again then the controller will
return to status mode, but if either of the up or down keys are pressed to change
the parameter being viewed before the MODE key is pressed, pressing the
MODE key will change the display to parameter edit mode again. This allows the user to
easily change between parameter view and edit mode while setting up the field
controller.
Pressing the up and down keys simultaneously when editing a parameter will set
the value to zero immediately.
If no action is made while in parameter view or edit mode for 4 minutes the status mode
is entered automatically.
5.2 Resetting the field controller
The controller can be reset using the keypad by pressing the mode key for at least
two seconds in status or parameter view mode.
A reset is required in response to the following conditions:
To reset the controller from a tripped state
To implement a change in the value of certain parameters
5.3 Security
In the field controller’s default state no security is implemented, and any R/W parameter
can be adjusted. If Pr 98 (user security code) is set to any value other than 0, then the
value programmed will be taken as a security code. With a security code programmed,
on power up, no R/W parameter can be altered. It will not be possible to change any
parameter without first entering the security code. If Pr 98 is selected for viewing when a
security code has been programmed the value indicated will be 0 (to prevent the code
programmed from being read).
When a security code has been programmed, any attempt to enter edit mode will cause
the field controller to flash 'CodE' on the 4 digit display to prompt the user for a security
code (providing the parameter is R/W and not R/O). When the Up or Down keys
are pressed, the 4 digit display will then show the code being adjusted and the 2 digit
display will indicate 'Co'. On setting the code, the user presses the MODE key. If the
correct code has been entered then the field controller will switch to parameter edit
mode on the parameter the user had selected to edit, but if the correct code has not
been entered the field controller will return to parameter view mode.
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