Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 252)

252 Rockwell Automation Publication 1752-UM001E-EN-P - June 2014
Appendix D Function Blocks Command Reference
Override Sequence
The override sequence in this example is described below.
1. The Output Enable signal is off.
2. When the override inputs turn on, the override function starts and the
overriding signal turns on. As long as the override inputs are on, the muting
status is forcibly enabled, and both the muting and Output Enable signals
are on.
3. When the workpiece moves to the right until it is no longer detected by
the sensor (sensor 12 in this case), the muting status forced by the override
function is cleared, and both the muting and Output Enable signals turn
off.
Override Start Conditions
If the following conditions are met, the override function starts and the Output
Enable, muting, and overriding signals turn on.
• At least one muting sensor is on.
• The light curtain is inactive (obstructed).
• The Output Enable is off.
• The override input signal is on (when set as a single input) or active (when
set as dual inputs).
Override Stop Conditions
If any one of the following conditions is met, the override function stops and the
muting and overriding signals turn off.
• The muting signals are all off.
• The maximum override time has elapsed.
• The Override Input signal is off (when set as a single input) or inactive
(when set as dual inputs).
When the override function has stopped, the Output Enable turns off if the light
curtain is obstructed.