Dukane iQ LS-E Catatan Aplikasi - Halaman 13

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iQ LS / LS-E Automation Controlled Probe Generator Timing Diagrams

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Normal Weld Cycle - A normal weld cycle lasts as long as the U/S Activate input is in a high state. This cycle shows the

timing between activation/deactivation of the U/S Activate input, U/S Status output and Ready Status output signals.

The Ready Status Output: The Ready Status output is used to determine if the generator is ready to start a new weld

cycle. As seen in Figure 1, the Ready Status output requires a minimum of 3ms to change to its deactivated state after the

U/S Activate input is activated. For correct operation, a PLC controlling an LS or LS-E Automation generator must delay at

least 3ms after activating the U/S Activate input before checking the Ready Status output. At the end of a normal cycle,

the Ready Status output requires a minimum of 19.5ms to change to its activated state after the U/S Activate input has

deactivated. For correct operation, a PLC controlling an LS or LS-E Automation generator must delay at least 19.5ms

after deactivating the U/S Activate input before checking the Ready Status output. It is possible that the stack ring down

time (stack stops vibrating), which is stack and application dependent, will make this time much longer.

The U/S Status Output: The U/S Status output is used to determine when the generator has activated its ultrasound

ouput to the ultrasonic stack. As seen in Figure 1, the U/S Status output requires a minimum of 5ms to change to its

activated state. For correct operation, a PLC controlling an LS or LS-E Automation generator must delay at least 5ms after

activating the U/S Activate input before checking the U/S Status output. At the end of a normal cycle, the U/S Status

output requires a minimum of 18.0ms to change to its deactivated state after the U/S Activate input has deactivated. For

correct operation, a PLC controlling a LS or LS-E Automation generator must delay at least 18.0ms after deactivating the

U/S Activate input before checking the U/S Status output.

Weld Cycle with an Overload - This weld cycle shows the same timing relationship as a normal weld cycle except the

ultrasound output, indicated by the U/S Status output, is terminated early due to an overload condition.

The Any Fault Status Output: The Any Fault Status output is used to determine when the generator has terminated the

weld cycle due to an overload. When an overload occurs, the Any Fault Status output activates at the same time the U/S

Status output deactivates. The Ready Status output doesn't activate until the U/S Activate output deactivates. The Ready

Status output requires a minimum of 20.0ms to change to its activated state after the U/S Activate input has deactivated.

For correct operation, a PLC controlling an LS or LS-E Automation generator must delay at least 20.0ms after deactivating

the U/S Activate input before checking the Ready Status output.The Any Fault Status output will deactivate the next time

the U/S Activate input is activated, but is delayed up to 3ms.

The Overload Status Output: The Overload Status output is also used to determine when the generator has terminated

the weld cycle due to an overload.The Overload Status output has the same timing as the Any Fault Status output and will

deactivate the next time the U/S Activate input is activated, but is delayed up to 3ms.

AN502 (REV 07)

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Figure 1: LS / LS-E Weld-by-Automation Cycle Timing Diagram

APPLICATION NOTE

AN502