Mitsubishi Electronics QD75D, QD75P user manual Current value changing, Md.21

9MAJOR POSITIONING CONTROL

9.2.19 Current value changing

MELSEC-Q

When the current value is changed to a new value, control is carried out in which the

"

Md.20

Current feed value" of the stopped axis is changed to a random address set

by the user. (The " is changed.)

Md.21

Machine feed value" is not changed when the current value

The two methods for changing the current value are shown below.

[1]Changing to a new current value using the positioning data

[2]Changing to a new current value using the start No. (No. 9003) for a current value changing

The current value changing using method [1] is used during continuous positioning of multiple blocks, etc.

[1] Changing to a new current value using the positioning data

Operation chart

The following chart shows the operation timing for a current value changing. The

"Md.20

Current feed value" is changed to the value set in "

Da.6

Positioning

address/movement amount" when the positioning start signal turns ON.

		ON
Positioning start signal
	OFF
[Y10,Y11,Y12,Y13]
Md.20 Current feed value
	50000	0

Current feed value changes to the positioning address designated by the positioning data of the current value changing.

The above chart shows an example when the positioning address is "0".

Restrictions

(1) An axis error "New current value not possible (error code: 515)" 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 current value changing.)

(2) "Current value changing" cannot be set in "

Da.2

Control system" of 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", "current value changing" cannot be set in positioning data No. 2.) An axis error "New current value not possible (error code: 515)" will occur and the machine will carry out a deceleration stop if this type of setting is carried out.

(3)An axis error "Outside new current value range (error code: 514)" will occur and the operation cannot start if "degree" is set in " Pr.1 Unit setting" and the

value set in " Da.6 Positioning address/movement amount" is outside the setting range (0 to 359.99999 [degree]).

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