Rockwell Automation Guardmaster 440R-ENETR, Руководство пользователя, Страница: 66 / 86

66 Rockwell Automation Publication 440R-UM009C-EN-P - July 2019
Chapter 8 Studio 5000 Example Logix Code
Lock and Unlock a Nonlocking Device
When an unlock command is sent to a tap connected to a non-locking device
(like an E-stop), the GuardLink safety signal turns OFF. When a lock command
is sent to a tap connected to a non-locking device, the tap turns ON. The
following events occur when an unlock command is issued to an individual tap
that is not connected to a locking switch.
Figure 50 , an unlock command is sent to tap 4 on Relay 1, GuardLink1. Tap 4 is
an E-stop.
Figure 50 - Unlock Tap 4
1.
The GuardLink safety signal turns OFF.
• The Link indicator on all taps changes to solid red.
• The Device indicator on all taps changes to blinking green. Tap 4 blinks
green because the E-stop has not been pressed.
• The DG IN1 indicator changes to solid red.
• The DG output turns OFF.
2.
The following occurs in the Studio 5000 AOP:
• The GuardLink1.DeviceTrip.4 bit remains HI because the E-stop is not
pressed.
• The GuardLink1.Trip bit remains LO, because no devices are tripped.
• The Relay1_GSR_DG.PtS12 is LO, because the GuardLink Safety
signal is OFF.
• The Relay1_GSR_DG.SafetyInput01 is LO.
The unlock command for tap 4 must be cleared (set to 0), and a lock command
must be sent to tap 4 to restore the GuardLink safety signal ( Figure 51 ).
Figure 51 - Lock Tap 4