Dukane iQ LS-E Примечание по применению - Страница 14

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DUKANE
Intelligent Assembly Solutions
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: This is a Weld-by-Time cycle, meaning the Ultrasound output lasts as long as the Time Setting,
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which is 200ms in this case. A LS / LS-E generator requires communications interface such as Ethernet/IP to configure
the weld by Time, Peak Power, and Energy settings. While it is strongly reccomended that the communications network
be used instead of the descrete I/O, the network and descete I/O can be used together. Figure 2 shows the timing for
weld cycles that were configured via the network interface, but ultrasound is activated using the US Activate input instead
of the network. As with Weld-by Automation, the Ready Status output should be used to determine if the generator is
ready to start a new weld cycle. As seen in Figure 2, the Ready Status output requires a minimum of 3ms to change to its
deactivated state after the U/S Activate input is activated. At the end of the normal weld time, there is stack ring down
time, which is stack and application dependent, and may make this time much longer. The Ready Status output activates
after a minimum of 1.5ms or when the ring down time is complete, whichever occurs first. For correct operation, a PLC
controlling an LS / LS-E generator must delay at least 1.5ms after activating the U/S Activate input before checking the
Ready Status output. Since the U/S Status output takes up to 5.0ms to change state, a 5.0ms minimum delay is required
when monitoring this output. If a network is connected to the generator, then the US Activation can be controlled by the
network. The same is true for monitoring the status outputs. The delays will vary with the network based on network
settings, number of devices on the network, etc.
Cycle With an Overload: This weld cycle shows the same timing relationship except the ultrasound output, indicated by
U/S Status, is terminated early, in this case after 100ms, due to an overload condition.. The Any Fault Status and
Overload Status outputs activate at the same time U/S Status deactivates. The Ready Status output activates after a
minimum of 3.0ms or when the ring down time is complete, whichever occurs first. The Any Fault Status and Overload
Status outputs will deactivate the next time the U/S Activate input is activated, but are delayed up to 3.0ms.
AN502 (REV 07)
Page 14 of 16
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Figure 2: LS / LS-E Weld-by-Time Cycle Timing Diagram
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APPLICATION NOTE
AN502
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