LINK Systems System 2500 PLS - Manual (Page 39)

System 2500 Operating & Installation Manual - Revision 07 2-31
DIE-PROT: ON | DIE-PROT LOCKED ON
LOCK INPUT: HI | DEACTIVATE LOCK
Figure 7
Die-Pro On/Off Screen, Lock Input Active
When the lock function is to be used, input #32 cannot be programmed for any of the active die
protection modes (static, cyclic, etc.) Attempting to activate the lock feature with this input
programmed for die protection will result in a warning message. Conversely, once the lock
feature has been activated any attempt to program this input for die protection monitoring will be
disallowed.
Once a switch has been wired to Input #32, the lock feature must be activated. Prior to activation
the Die-Protection On/Off screen will appear as shown in Figure 5. The status message
following the ‘LOCK INPUT:’ label reads ‘UNUSED’, and with the keyswitch in PROGRAM
position the lower right portion of the screen
will display the (blinking) menu item ‘USE
LOCK INPUT’. Pressing ENTER as this
item blinks will cause the access code screen
to be displayed. The operator can then enter
the configuration access code whereupon the
lock feature will be activated and the Die
Protection On/Off screen redisplayed. With the lock feature active, two changes will be seen on
the screen that are illustrated in Figure 7. First, the ‘LOCK INPUT’ status message will display
the state of input #32, either ‘HI’ or ‘LO’. Second, the menu item in the lower right portion of
the screen will now display ‘DEACTIVATE LOCK’, giving the operator the option of
deactivating the lock feature using the access code.
With the external switch open (no ground connection) the LOCK INPUT status will be ‘HI’. In
this state the operator cannot bypass die protection and if the keyswitch is in PROGRAM
position the upper right portion of the screen will display the message ‘DIE-PROT LOCKED
ON’ as in Figure 7. With the external switch closed (input #32 grounded) the LOCK INPUT
status will be ‘LO’ and the bypass function will operate normally as described in Section 2.8.2.1
above.
If the lock feature is to be deactivated, turn the keyswitch to the PROGRAM position, causing
the menu item ‘DEACTIVATE LOCK’ to be displayed, and press the ENTER key. The access
code screen will again be displayed, and proper entry of the code will deactivate the lock. The
On/Off screen will then be redisplayed with the LOCK INPUT status listed as UNUSED.
2.8.3 TIMING CHANNELS
Many die protection functions involve some action that must take place at a certain point in the
machine stroke. For example, a part is expected to eject at some point in the upstroke; a transfer
mechanism must be clear of the die prior to some point early in the downstroke; and so on. To
provide timing for monitoring events like these, the System 2500 has eight timing channels
numbered 17 through 24. The timing channels can be set to turn on and off once on each
machine stroke. The 'on' portion is called the timing 'window' and designates the region where