Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 103)

Load Initial Configuration Values
Chapter 7
7-27
Tonnage Watchdog Timer Preset
(LPC07)
The QDC module starts an internal Tonnage watchdog timer every time it
completes execution of Low Pressure Close. The QDC module stops this
timer when clamp pressure exceeds the tonnage preset (CPC63).
You are asked to enter a Watchdog Timer setpoint in word LPC07. Any
time the internal timer’s accumulated value is equal to or greater than this
value, the QDC module sets the Tonnage Watchdog Timer alarm bit
(SYS04-B15). An entry of 0 in LPC07 inhibits actuation of this alarm.
Enter 0 for the Tonnage Watchdog Timer Preset. Additional information to
assist you in selecting the final value required by your application may be
obtained by referencing Section 3 of the Plastic Molding Module
Reference Manual (pub. no. 1771-6.5.88).
Profile Watchdog Timer Preset
(FCC08, SCC08, TCC08, LPC08, FOC08, SOC08, TOC08, OSC08, EAC08)
The QDC module starts an internal watchdog timer every time it initiates
execution of a new profile. The QDC module stops this timer and resets
the accumulated value to zero (after reporting the accumulated value back
to the PLC processor in the appropriate status block) each time it concludes
execution of the profile.
You are asked to enter a Watchdog Timer setpoint in word 08 of the subject
blocks. Any time the accumulated value of the internal timer is equal to or
greater than the value you place in the respective word, the QDC module
sets an appropriate Watchdog Timer alarm bit (SYS04-B00, SYS04-B01,
SYS04-B02, SYS04-B03, SYS04-B10, SYS04-B11, SYS04-B12,
SYS04-B13, or SYS04-B14 respectively) in the system status block. An
entry of 0 inhibits actuation of this alarm.
Important: The Ejector Advance (EAC08) Watchdog Timer Preset
watches over the entire ejector profile (Ejector Advance and Ejector
Retract), not just Ejector Advance.
Enter 0 for each Profile Watchdog Timer Preset. A detailed discussion of
this type of setpoint is in chapter 10 to assist you in selecting the correct,
final values required by your application. Additional information may also
be obtained by referencing Section 3 of the Plastic Molding Module
Reference Manual (pub. no. 1771-6.5.88).