IAI America PCON-CFA User Manual

Page 72

ACON-C/CG, PCON-C/CG

(26) Load output judgment (LOAD) PLC input signal Dedicated PCON function

This signal is available only in the pressing operation.

When this signal is used for pressing-in purpose, it should be known if the set load threshold is reached

during the pressing operation.

The load threshold and check range are set by the PLC and the LOAD signal will turn ON when the

command torque (motor current) exceeds the threshold inside the check range.

This signal judges the load output based on the fact that the command torque exceeds the threshold for the

specified time period.

This processing procedure is the same as for the pressing judgment. The judgment time period can be

changed freely using the parameter No. 50 “Load Output Judgment Time Period”.

This signal is continued until the next movement command is received.

Set the pressing speed using the parameter No. 34 “Pressing Speed”.

When the machine is delivered, it has been individually set depending on the actuator characteristics.

Set an appropriate speed considering the work part material and shape.

Set the parameter No. 50 “Load Output Judgment Time Period”.

Set the parameter No. 51 “Torque Inspected Range” to “0” (enabled).

Set the threshold inspected width using the PLC's Zone Boundary + Register or Zone Boundary -

Set the threshold using the PLC's Load Current Threshold Register.

Set the positioning band using the PLC's Positioning Band Register.

Set it a bit longer from the backmost position considering the mechanical dispersion of the work part.

Refer to the operation manual for the controller for more information.

Caution: x If the actuator pushes against the work part before the target position, it is regarded as a

servo-motor error.

Take care of the positional relationship between the target position and the work part

position.

The actuator continues to push the work part with the pressing current at the stop time

decided with the current-limiting value.

It is not the stop condition, so take the greatest care to deal with it.

Position where this signal is turned ON

when the command torque exceeds the

threshold within the torque inspected

width range

Crack range

Speed

Travel

Target position

Position where the actuator is pushed

against the work part and the pressing

completion is judged so the positioning

completion signal is turned “ON”

Positioning band (max. pressing level)

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