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Unidrive User Guide 77
Issue Number: 9 www.controltechniques.com
The drive is supplied with the button disabled. To enable this
button, set Pr 0.30 FWD/REV enable at 1.
Pr 0.31 indicates the number of the macro that is currently in operation.
Use Pr 0.32 to select the required serial communications mode as
follows:
Use Pr 0.34 to set up a User Security code. Irrespective of the code
number entered in Pr 0.34, it always indicates the default value 149.
When Pr 0.34 is actually set at 149, no User Security is applied.
See section 5.10 Parameter security on page 62.
6.2.11 Keypad-reference monitoring
0.35 indicates the value of the frequency/speed reference when the
drive is operating in Keypad mode. The reference is then controlled by
the following control buttons (when the display is in Status mode):
The value is automatically saved when the drive is powered-down. At
the next power-up, the drive ramps up to the frequency/speed that
applied before the power-down.
6.2.12 Serial communications,
Parameter displayed after power-up
*This parameter has a default setting of 9,600 (1) in the VTC variant
when USA defaults are loaded.
Use Pr 0.36 to select the required baud rate for serial communications
when a UD71 Basic serial communications large option module is fitted
in the drive.
Use Pr 0.37 to select the required address for serial communications
when a UD71 Serial communications large option module is fitted in the
drive.
Do not enter an address that contains a zero, since this is used when
addressing a group of drives.
*This parameter has a default setting of Pr 0.11 in the VTC variant when
USA defaults are loaded.
At the time the AC supply is connected to the drive, Pr 0.10 Motor
frequency/speed is automatically pre-selected as the initial parameter to
be displayed. This results in the following:
1. After the AC supply is connected to the drive, and before any other
parameter is selected, the value of Pr 0.10 is shown on the upper
display. This allows the motor frequency/speed to be monitored
without the need to select the parameter.
2. If the keypad is subsequently used to select another parameter, the
value of the newly selected parameter is displayed in place of the
initial parameter.
To select a different Menu 0 parameter to be displayed initially, enter the
required parameter number in Pr 0.38 (e.g. to display Pr 0.12 Post-ramp
frequency/speed reference, enter 0.12).
6.2.13 Spinning motor, Autotune, PWM switching
frequency
Open-loop
Set Pr 0.39 at 1 for the drive to always automatically synchronise itself to
the motor if the motor is already rotating when the drive is started.
If the drive is started when the motor is already spinning and Pr 0.39 is
set at 0, the drive cannot detect the speed of the motor; the normal
operation of the drive will cause the motor to be braked to a stand-still in
the same way as
DC injection braking. The drive will then accelerate the
motor to the value of the frequency reference.
Note
The drive can be synchronised to a single motor only. If more than one
motor is connected to the drive, this function should not be used.
0.30 {6.13} Forward / reverse key enable
RW Bit
Ú
0 or 1
Ö
0
0.31 {11.37} Macro number
RO Uni
Ú
0 to 9
Ö
0.32 {11.24} Serial comms. mode
RW Uni R P
Ú
ANSI 2 (0)
ANSI 4 (1)
OUtPUt (2)
INPUt (3)
Ö
ANSI 4 (1)
ANSI 2 (0) ANSI protocol, two-wire
ANSI 4 (1) ANSI protocol, four-wire
Use the following modes to transfer the value of a parameter in one
drive to a parameter in another drive:
OUtPUt (2)
Transmit the value of the parameter specified by the setting of
Pr
11.27 Serial comms. source / destination parameter
(CT protocol)
INPUt (3)
Apply the received value to the parameter specified by the setting
of Pr
11.27 Serial comms. source / destination parameter (CT
protocol)
0.33 {11.32} Drive rated current (FLC)
RO Uni P
Ú
2.10 to 1,920 A
Ö
0.34 {11.30} User security code
RW Uni S P
Ú
0 to 255
Ö
149
0.35 {1.17} Keypad control mode reference
RO Bi S P
OL
Ú
±[Pr 0.02]Hz
Ö
CL
Ú
±[Pr 0.02]rpm
Ö
0.36 {11.25} Serial comms. baud rate
RW Txt P
Ú
4,800 (0)
9,600 (1)
19,200 (2)
2,400 (3)
Ö
4800 (0)*
0.37 {11.23} Serial comms. address
RW Uni P
Ú
0.0 to 9.9 (Group.Unit)
Ö
1.1
0.38 {11.22} Initial parameter displayed
RW Uni P
Ú
Pr 0.00 to Pr 0.50
Ö
Pr 0.10*
0.39 {6.09} Synchronise to a spinning motor
RW Bit
OL
Ú
0 or 1
Ö
0
CL
Ú
0 or 1
Ö
1
NOTE
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