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88 Digitax ST User Guide
Issue: 5
9.20 vl velocity mode
Velocity mode is supported and the scaled velocity is written to the drive
internal speed shortcut. Table 9-79 lists the objects that are supported:
Table 9-79 vl velocity mode supported objects
9.20.1 0x6042 vl_target_velocity
This object is used to set the required velocity of the system. It is
multiplied by the vl_dimension_factor and the vl_setpoint_factor. The
value is given in rpm, If the vl_dimension_factor has the value of 1,
otherwise the value is in user units. Positive values indicate forward
direction and negative values indicate reverse direction.
Table 9-80 vl_target_velocity
9.20.2 0x6043 vl_velocity_demand
This read only object provides the instantaneous velocity demand
generated by the drive ramp function. The value is given in rpm if the
vl_dimension_factor and the vl_setpoint_factor have the value 1,
otherwise the value is in user units. Positive values indicate forward
direction and negative values indicate reverse direction.
Table 9-81 vl_velocity_demand
9.20.3 0x6044 vl_velocity_actual_value
This read only object provides the velocity at the motor spindle or load.
In a closed loop system this is determined from the motor feedback
device and in an open loop system it is a copy of vl_velocity_demand.
The value is given in rpm if the vl_dimension_factor has the value of 1,
otherwise the value is in user units. Positive values indicate forward
direction and negative values indicate reverse direction.
Table 9-82 velocity_actual_value
9.20.4 0x6046 vl_velocity_min_max_amount
This object is used to configure the minimum and maximum velocity.
The value is given in rpm if the vl_dimension_factor has the value of 1,
otherwise the value is in user units.
Table 9-83 vl_velocity_min_max_amount
9.20.5 0x6047 vl_velocity_min_max
This object is used to configure the minimum and maximum velocity.
The value is given in rpm if the vl_dimension_factor has the value of 1,
otherwise the value is in user units.
Table 9-84 0x6047 vl_velocity_min_max
Index Name
0x6042 vl_target_velocity
0x6043 vl_velocity_demand
0x6044 vl_velocity_actual_value
0x6046 vl_velocity_min_max_amount
0x6047 vl_velocity_min_max
0x6048 vl_velocity_accleration
0x6049 vl_velocity_deceleration
0x604A vl_velocity_quick_stop
0x604B vl_setpoint_factor
0x604C vl_dimension_factor
0x6042 vl_target_velocity
Access: RW
Range: -32768
to +32767
Size: Signed 16 Unit: rpm
Default: 0
Description: Used to set the required velocity of the system.
0x6043 vl_velocity_demand
Access: RO
Range: -32768
to +32767
Size: Signed 16 Unit: rpm
Default: 0
Description:
Provides the instantaneous velocity demand generated by
the drive ramp function.
0x6044 vl_velocity_actual_value
Access: RO
Range: -32768
to +32767
Size: Signed 16 Unit: N/A
Default: 0
Description: Provides the velocity at the motor spindle or load.
0x6046 vl_velocity_min_max_amount
Sub-index 0
Access: RO Range: N/A
Size:
Unsigned 8
Unit: N/A
Default: 2
Description: The number of sub-indices in this object.
Sub-index 1
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 0
Description:
Used to configure the minimum velocity (both in the
forward and reverse direction) that the system can
operate at. Writing to this sub index will overwrite
vl_velocity_min positive and vl_velocity_min negative.
Sub-index 2
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 2147483647
Description:
Used to configure the maximum velocity (both in the
forward and reverse direction) that the system can
operate at. Writing to this sub index will overwrite
vl_velocity_max positive and vl_velocity_max negative.
0x6047 vl_velocity_min_max
Sub-index 0
Access: RO Range: N/A
Size:
Unsigned 8
Unit: N/A
Default: 4
Description: The number of sub-indices in this object.
Sub-index 1
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 0
Description:
Used to configure the minimum positive velocity at which
the system can operate.
Sub-index 2
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 2147483647
Description:
Used to configure the maximum positive velocity at
which the system can operate.
Sub-index 3
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 0
Description:
Used to configure the minimum negative velocity at
which the system can operate.
Sub-index 4
Access: RW
Range: 0 to
0xFFFFFFFF
Size:
Unsigned 32
Unit: rpm
Default: 2147483647
Description:
Used to configure the maximum negative velocity at
which the system can operate.
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