11 MANUAL CONTROL

Restricted items

MELSEC-Q

A manual pulse generator is required to carry out manual pulse generator operation.

Precautions during operation

The following details must be understood before carrying out manual pulse generator operation.

(1) The speed during manual pulse generator operation is not limited by the

"

Pr.8

Speed limit value".

(2) If the "

Cd.21

Manual pulse generator enable flag" is turned ON while the

QD75 is BUSY (BUSY signal ON), a warning will occur (warning code 100: start during operation).

(3)If a stop factor occurs during manual pulse generator operation, the operation will stop, and the BUSY signal will turn OFF.

At this time, the "

Cd.21

Manual pulse generator enable flag" will be left ON,

but manual pulse generator operation will not be possible. To carry out manual pulse generator operation again, measures must be carried out to eliminate the stop factor. Once eliminated, the operation can be carried out again by

turning the "

Cd.21

Manual pulse generator enable flag" ON OFF ON.

(4)Pulses will not be output if an error occurs when the manual pulse generator operation starts.

REMARK

One QD75 module can be connected to one manual pulse generator.

The QD75 module can simultaneously output pulses to the axis 1 to axis 4 drive units by one manual pulse generator.

(1-axis to 4-axis simultaneous operation is possible.)

Errors during operation

When the operation is stopped by the stroke limit (limit signal OFF), manual pulse generator operation can be performed in the direction in which the limit signal turns ON after an error reset. (An error will occur again if pulse input is provided in the direction in which the limit signal turns OFF is turned ON.)

V

Manual pulse generator operation

Manual pulse generator

Manual pulse generator

operation possible

operation not possible

ON

 

Upper/lower

OFF

limit signal

 

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Image 468
Mitsubishi Electronics QD75P, QD75D user manual Restricted items, Operation possible Operation not possible Upper/lower