Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 248)

248 Rockwell Automation Publication 1752-UM001E-EN-P - June 2014
Appendix D Function Blocks Command Reference
Distance Settings
When setting up this type of muting application, the distance settings must
prevent a passing person from enabling the muting function, and the light curtain
and muting sensors must be set up so that a workpiece passes by all of the muting
sensors before the next workpiece arrives at the muting sensors.
To calculate the appropriate setup distances for this example, use these formulas,
where:
D2 and D3 = minimum distance required for muting sensor performance
d2 = maximum distance required for muting sensor performance
L = length of the workpiece
V = transit speed of the workpiece
T1min = controller cycle time
T1max= synchronization time setting (the default setting is 3 seconds)
Formula 3: D2 < L
Formula 4: D3 < L
Formula 5: V x T1min < d2 < V x T1max
For the muting function to operate effectively, formulas 3, 4, and 5 must be
satisfied.
Sequential Muting (both directions) Timing Charts
Figure 69 - Entrance Timing Chart
AOPD Input 1 (NC)
AOPD Input 2 (NC)
Muting Signal 11
Muting Signal 12
Output Enable
Muting
Muting Time Synchronization Time
Muting Signal 21
Muting Signal 22