Mitsubishi Electronics QD75D, QD75P Monitoring the current value, Da.6, Buffer memory addresses

9MAJOR POSITIONING CONTROL

Restrictions

MELSEC-Q

(1)A 1.8ms error will occur in the current value update timing when the stored "current feed value" is used in the control.

A 56.8ms error will occur in the current value update timing when the stored "machine feed value" is used in the control.

(2)The "current feed value" and "machine feed value" may differ from the values

set in "

Da.6

Positioning address/movement amount" of the positioning data if

the movement amount per pulse is not set to "1".

Monitoring the current value

The "current feed value" and "machine feed value" are stored in the following buffer memory addresses, and can be read using a "DFRO (P) command" from the PLC CPU.

			Buffer memory addresses
		Axis 1	Axis 2	Axis 3	Axis 4
Md.20	Current feed value	800, 801	900, 900	1000, 1001	1100, 1101
Md.21	Machine feed value	802, 803	902, 903	1002, 1003	1102, 1103

Example

Program in which the axis 1 current feed value is read to D104 and D105

<Read current feed value to D104 and D105>

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