9 MAJOR POSITIONING CONTROL

MELSEC-Q

Restrictions

(1)An axis error "Continuous path control not possible (error code: 516)" will occur and the operation cannot start if "continuous path control" is set in

" Da.1 Operation pattern". ("Continuous path control" cannot be set in fixed-

feed control.)

(2)If the movement amount of each axis exceeds "1073741824 (=230)" when "0: Composite speed" is set in " Pr.20 Interpolation speed designation method",

the "Outside linear movement amount range error (error code: 504)" occurs at a positioning start and positioning cannot be started. (The maximum movement amount that can be set in " Da.6 Positioning address/movement amount" is "1073741824 (= 230)".

(3)"Fixed-feed" cannot be set in " Da.2 Control system" in the positioning data

when "continuous path control" has been set in " Da.1 Operation pattern" of

the immediately prior positioning data. (For example, if the operation pattern of positioning data No. 1 is "continuous path control", fixed-feed control cannot be set in positioning data No. 2.) An axis error "Continuous path control not possible (error code: 516)" will occur and the machine will carry out a deceleration stop if this type of setting is carried out.

Positioning data setting example

[Reference axis is designated as axis 1.]

The following table shows setting examples when "3-axis fixed-feed control (fixed- feed 3)" is set in positioning data No. 1 of axis 1. (The required values are also set in positioning data No. 1 of axis 2 and axis 3.)

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Mitsubishi Electronics QD75D, QD75P user manual Restrictions