Dukane iQ LS-E Nota de aplicação - Página 15

Procurar online ou descarregar pdf Nota de aplicação para Fonte de alimentação Dukane iQ LS-E. Dukane iQ LS-E 16 páginas. Ultrasonic probe system, automation interface guidelines

Imprimir página

DUKANE

Intelligent Assembly Solutions

Probe selection changed between weld cycles: Although the probe selection can be changed at any time this method

is the safest and most predictable. The PLC program should monitor the MPC Ready output and when it becomes active

change the probe selection using the Remote Setup inputs. This will insure that the stack ring down from the previous

cycle is finished. After a delay of at least 33ms, the MPC Ready output will change to inactive (low in this case) again and

stay that way for 33ms. See Figure 3 where Remote Setup 0 changes from low to high. The PLC should continue to

monitor the MPC Ready output and start the next cycle when MPC Ready activates (high in this case).

Probe selection changed during a weld cycle: Alternately the Remote Setup inputs can change during the weld cycle.

The MPC circuitry will not select a new probe when the MPC Ready output is not active. As can be seen in Figure 3,

Remote Setup 0 input is changed to inactive before the weld cycle completes. Once the stack ring down completes the

relays switch so that probe 1 is selected almost immediately, but the relay takes up to 8ms to settle. The MPC Ready

output will remain inactive for 33ms after ring down completes. In this case the PLC must monitor the MPC Ready output

and not activate the U/S Activate input until the MPC Ready signal is active.

Timing Diagram Notes: All Signals are active high and the grey areas indicate that the output could be either high or low.

symbol indicates a time break so that the time where nothing is happening doesn't need to be shown.

The

AN502 (REV 07)

Page 15 of 16

(

Figure 3 LS / LS-E with MPCQ Weld Cycle (Weld-by-Automation)

)

APPLICATION NOTE

AN502