YASKAWA SGD7S-1R9D Product Manual page 164

5.14 Setting Unit Systems
5.14.3 Setting the Acceleration Reference Unit
5.14.3 Setting the Acceleration Reference Unit
Set the acceleration reference unit [Acc Unit] in acceleration user unit (2703 hex).
Important
Index
2703
hex
Setting range: 1/128 ≤ Numerator/Denominator ≤ 262,144
Example
5.14.4 Setting the Torque Reference Unit
Set the torque reference unit [Torque Unit] in torque user unit (2704 hex).
Index
2704
hex
Setting range: 1/256 ≤ Numerator/Denominator ≤ 1
5-48
For a Rotary Servomotor with an encoder resolution of 24 bits (16,777,216), Pn20E (Electronic
Gear Ratio (Numerator)) is automatically set to 16 and Pn210 (Electronic Gear Ratio (Denomina-
tor)) is automatically set to 1. Therefore, the encoder resolution will be equivalent to 20 bits
(1,048,576). Consider this when you set the position reference unit in position user unit (2701
hex).
Subin-
Name
dex
0 Number of entries
1 Numerator
2 Denominator
(Alarm A.A20 will be detected if the setting exceeds the setting range.)
Acceleration Reference Unit Setting Example (Electronic Gear Ratio Setting Example for a
Ball Screw)
• Acceleration User Unit (2703 hex)
Converting one user-defined acceleration reference unit [0.1 mm/s
1 [Acc unit]
16,777,216 [inc] × (1/16)
=
6 [mm]
1,048,576
=
4 2
[10 inc/s ]
6 × 10
5
Therefore, the objects are set as follows:
Object 2703 hex: 01 (Numerator) = 1,048,576
Object 2703 hex: 02 (Denominator) = 600,000
Subin-
Name
dex
0 Number of entries
1 Numerator
2 Denominator
(Alarm A.A20 will be detected if the setting exceeds the setting range.)
Data
Access
Type Mappings
USINT RO
UDINT RW
UDINT RW
× 0.1 [mm/s ] × 10
2 -4
Data
Access
Type Mappings
USINT RO
UDINT RW
UDINT RW
PDO
Value
No 2
1 to 1,073,741,823
No
(default: 1)
1 to 1,073,741,823
No
(default: 1)
2 4
] into [10 inc/s
PDO
Value
No 2
1 to 1,073,741,823
No
(default: 1)
1 to 1,073,741,823
No
(default: 10)
Saving to
EEPROM
No
Yes
Yes
2
]:
Saving to
EEPROM
No
Yes
Yes