Safety
Information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running the
motor
Optimization
EtherCAT
interface
SMARTCARD
Operation
Onboard
PLC
Advanced
parameters
Technical
Data
Diagnostics
UL listing
information
Digitax ST User Guide 113
Issue Number: 5
Parameter ranges and variable maximums:
The two values provided define the minimum and maximum values for the given parameter. In some cases the parameter range is variable and
dependant on either:
• other parameters
• the drive rating
• drive mode
• or a combination of these
The values given in Table 12-4 are the variable maximums used in the drive.
Table 12-4 Definition of parameter ranges & variable maximums
Maximum Definition
SPEED_REF_MAX
[40000.0rpm]
Maximum speed reference
If Pr 1.08 = 0: SPEED_REF_MAX = Pr 1.06
If Pr 1.08 = 1: SPEED_REF_MAX is Pr 1.06 or – Pr 1.07 whichever is the largest
(If the second motor map is selected Pr 21.01 is used instead of Pr 1.06 and Pr 21.02 instead of Pr 1.07)
SPEED_LIMIT_MAX
[40000.0rpm]
Maximum applied to speed reference limits
A maximum limit may be applied to the speed reference to prevent the nominal encoder frequency from
exceeding 500 kHz. The maximum is defined by
SPEED_LIMIT_MAX (in rpm) = 500 kHz x 60 / ELPR = 3.0 x 10
7
/ ELPR subject to an absolute maximum of
40,000 rpm.
ELPR is equivalent encoder lines per revolution and is the number of lines that would be produced by a
quadrature encoder.
Quadrature encoder ELPR = number of lines per revolution
F and D encoder ELPR = number of lines per revolution / 2
Resolver ELPR = resolution / 4
SINCOS encoder ELPR = number of sine waves per revolution
Serial comms encoder ELPR = resolution / 4
This maximum is defined by the device selected with the speed feedback selector (Pr 3.26) and the ELPR set
for the position feedback device.
SPEED_MAX
[40000.0rpm]
Maximum speed
This maximum is used for some speed related parameters in menu 3. To allow headroom for overshoot etc. the
maximum speed is twice the maximum speed reference.
SPEED_MAX = 2 x SPEED_REF_MAX
DRIVE_CURRENT_MAX
[9999.99A]
Maximum drive current
The maximum drive current is the current at the over current trip level and is given by:
DRIVE_CURRENT_MAX = K
C
/ 0.45
AC_VOLTAGE_SET_MAX
[690V]
Maximum output voltage set-point
Defines the maximum motor voltage that can be selected.
200 V drives: 240 V, 400 V drives: 480 V
AC_VOLTAGE_MAX
[930V]
Maximum AC output voltage
This maximum has been chosen to allow for maximum AC voltage that can be produced by the drive including
quasi-square wave operation as follows:
AC_VOLTAGE_MAX = 0.78 x DC_VOLTAGE_MAX
200 V drives: 325 V, 400 V drives: 650 V
DC_VOLTAGE_SET_MAX
[1150V]
Maximum DC voltage set-point
200 V rating drive: 0 to 400 V, 400 V rating drive: 0 to 800 V
DC_VOLTAGE_MAX
[1190V]
Maximum DC bus voltage
The maximum measurable DC bus voltage.
200 V drives: 415 V, 400 V drives: 830 V
MOTOR1_CURRENT_LIMIT_MAX
[1000.0%]
Where:
The Maximum current is either (1.75 x
K
C
) when the motor rated current set in Pr
5.07
is less than or equal to the
maximum Heavy Duty current rating given by Pr
11.32
, otherwise it is (1.1 x Normal Duty rating).
Motor rated current is given by Pr 5.07
MOTOR2_CURRENT_LIMIT_MAX
[1000.0%]
Maximum current limit settings for motor map 2
This maximum current limit setting is the maximum applied to the current limit parameters in motor map 2.
The formulae for MOTOR2_CURRENT_LIMIT_MAX are the same for MOTOR1_CURRENT_LIMIT_MAX
except that Pr 5.07 is replaced with Pr 21.07 and Pr 5.10 is replaced with Pr 21.10.
TORQUE_PROD_CURRENT_MAX
[1000.0%]
Maximum torque producing current
This is used as a maximum for torque and torque producing current parameters. It is
MOTOR1_CURRENT_LIMIT_MAX or MOTOR2_CURRENT_LIMIT_MAX depending on which motor map is
currently active.
Maximum
current limit
=
[
Maximum current
]
x 100%
Motor rated current
To Next Page
Loading...
Need help?
General
