These  keys  can  be  pressed  anytime,  and  the  key  feedback  (beep)  may  be the  only  acknowledgment  of the  action. 
Typically,  the  LED  tracks  the  function  and  illuminates  each  time  the  associated  key  is pressed. 
Use  of  key  functions  can  be  controlled  by  assigning  operator  access  levels  to  each  key  (see  “Operator  Access 
Levels”  in this  section  and  “Log  In Procedure”  in  Section  1.) 
FUNCTION  KEYS 
Four  function  keys  (cFl>,  <F2>,  cF3>,  and  cF4>)  are  located  directly  above  the  alphanumeric  display  (see  Figure 
16). Within  the  Main  Menu  options,  these  key  definitions  change  as  required  to  perform  specific  actions  for  selected 
Main  Menu  options.  The  definitions  for  each  key  are  shown  on  the  top  line  of the  alphanumeric  display  as  an  aid  to 
the  user.  A function  key  does  not  require  any  other  key to  be  pressed  to  activate  its function.  Pressing  a key  causes 
that  key  to  immediately  perform  its defined  task.  Pressing  a key  which  has  no defined  action  for  the  current  function 
has  no  effect.  However,  the  tone-alert  acknowledges  the  key  press  with  a  “beep.”  These  four  keys  are  associated 
with  advanced  functions  of the  system  within  the  Main  Menu  options,  and  within  point  displays.  These  keys  may  be 
passcode  protected  for  some  of the  defined  operations. 
The  cFl>,  <F2>,  <F3>,  and  cF4>  have  extended  actions  defined  during  point  displays  used  in conjunction  with  the 
<FUNCTION>  key  on  the  DISPLAY/ACTION  keypad.  The  actions  vary  with  the  point  and  status  displayed. 
7  FUNCTION  KEYS  1 
SYSTEM  IS  NORMAL 
6:15:43pm  MON  04-APR-94 
Figure  16 
FUNCTION  KEYS 
HOW  TO  SET  TIME  AND  DATE 
The  following  is an  example  of  how  to  use  the  function  keys  to  set  the  time  and  date. 
1.  Press  the  <MENU>  key  on  the  DISPLAY/ACTION  keypad.  The  following  is  shown  on  the  alphanumeric 
display. 
I 
Press  <NEXT>  or  <PREVIOUS>  to  scroll 
Change  Access  Level? 
2.  Press  the  <NEXT>  key.  The  following  is displayed. 
I 
Press  <NEXT>  or  <PREVIOUS>  to  scroll 
Set  Time  and  Date? 
I 
38 
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