Table of Contents
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Parameter
Parameter Name
No.
control mode
Position deviation
70
error level
Used by
71
manufacturer
72
Overload level
73
Overspeed level
Used by
74
manufacturer
Used by
75
manufacturer
Used by
76
manufacturer
Used by
77
manufacturer
78
Numerator of
*
external scale ratio
Multiplier of
79
numerator of
*
external scale ratio
7A
Denominator of
*
external scale ratio
7B
Hybrid deviation
*
error level
7C
External scale
*
direction
Used by
7D
manufacturer
Used by
7E
manufacturer
Used by
7F
manufacturer
A4P
Related
Setting
range
Sets a position deviation excess range.
The unit is [256 x resolution].
P, F
0 - 32767
Use the number of encoder pulses in setting.
When this parameter is 0, the position deviation excess detection is disabled.
Use the number of external scale pulses in full-closed control.
Sets the overload level. When the set value is 0, the overload level is set to 115[%].
Set it to 0 normally.
P, F
0 - 500
The set value of this parameter is limited to 115[%] of the motor rating.
When using any lower overload level, set a desired level before use. The unit is [%].
Sets the overspeed level. When the set value is 0, the overspeed level is set to the
maximum number of motor revolutions x 1.2. Set it to 0 normally.
The set value of this parameter is limited to the maximum number of motor
revolutions × 1.2.
P, F
0 - 20000
When using any lower overspeed level, set a desired level before use.
The unit is [r/min].
(Note) The detection error of the set value is ±3[r/min] for the 7-core absolute
encoder, and ±36[r/min] for the 5-core incremental encoder.
Sets the ratio of encoder resolution to external scales resolution at the time of full-closed
F
0 - 32767
control.
Encoder resolution per motor
F
0 - 17
External scale resolution per motor
Servo parameter No.78=0: The numerator equals encoder resolution, and Servo parameter
No.7A can be used to set the external scale resolution.
Servo parameter No.78≠0: Set the external scale resolution per revolution according to
the above expression.
Refer to the section 11-6-4 before use.
F
1 - 32767
Note)
• The actual numerator is calculated as the n
ratio (Servo parameter No.78) × 2 (the set value of Servo parameter No.79). The
maximum calculated value is 131072. Take note that any larger set value is disabled
and 131072 will be the maximum set value.
• Any change of this parameter shall be made during the Servo-OFF.
• Sets the tolerance in the present position between a motor and an external scale at the
F
1 - 10000
time of full-closed control.
• The unit to be used for the setting is [16 × external scale pulse].
Sets the logic of external scale absolute value data.
0: Serial data is increased when the detection head moves right (+ count).
1: Serial data is decreased when the detection head moves right (- count).
F
0 - 1
Note)
• The setting of this parameter is depend on the direction of external scale, not 16
bits positioning parameter No.50 (Operation direction setting). If the setting of this
parameter is wrong, you can not use full-closed control normally.
MOTOR COMPANY, MATSUSHITA ELECTRIC INDUSTRIAL CO.,LTD
No. SR-DSV09485
Function/Description
Pr.78×2
revolution
=
revolution
Pr.7A
th
power of the numerator of external scale
- 37 -
Pr.79
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