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MELSEC-Q

11 MANUAL CONTROL

11.3.3 Setting the required parameters for inching operation

The "Parameters" must be set to carry out inching operation.
The following table shows the setting items of the required parameters for carrying out
inching operation. When only inching operation will be carried out, no parameters
other than those shown below need to be set. (Use the initial values or setting values
within a range where no error occurs for trouble-free operation.)

Setting item

Setting requirement

Factory-set initial value

(setting details)

Param

eters

Pr.1 Unit setting

3 (pulse)

Pr.2 No. of pulses per rotation (Ap) (Unit: pulse)

20000

Pr.3 Movement amount per rotation (Al) (Unit: pulse)

20000

Pr.4 Unit magnification (Am)

1 (1-fold)

Pr.5 Pulse output mode

1 (CW/CCW mode)

Pr.6 Rotation direction setting

0 (current value increases by

forward run pulse output)

Pr.11 Backlash compensation amount (Unit: pulse)

Pr.12 Software stroke limit upper limit value (Unit: pulse)

2147483647

Pr.13 Software stroke limit lower limit value (Unit: pulse)

–2147483648

Pr.14 Software stroke limit selection

0 (current feed value)

Pr.15 Software stroke limit valid/invalid setting

0 (valid)

Pr.17 Torque limit setting value (Unit: %)

300

Pr.23 Output signal logic selection

0 (Pulse output to the drive

unit is negative logic)

Pr.31 JOG speed limit value (Unit: pulse/s)

20000

: Setting always required.
: Set according to requirements (Leave set to the initial value when not used.)

REMARK



Parameter settings work in common for all control using the QD75. When carrying

out other controls ("major positioning control", "high-level positioning control", and
“OPR positioning control"), the respective setting items must also be set.



Parameters are set for each axis.



Refer to CHAPTER 5 "DATA USED FOR POSITIONING CONTROL" for setting

details.