Optidrive Compact-2 Engineering Guide Issue 07.docx
Spin Start (S2 & S3 Only) / DC Injection Time On Start (S1 Only)
When enabled, on start up the drive will attempt to determine if the motor is already
rotating, and will begin to control the motor from its current speed. A short delay may be
observed when starting motors which are not turning.
Enabled on Trip, Brown
Out or Coast Stop
Spin start is only activated following the events listed, otherwise it is disabled.
Brake Chopper Enable (Not Size 1)
Enabled With Software Protection
Enables the internal brake chopper with software protection for a 200W
continuous rated resistor
Enabled Without Software Protection
Enables the internal brake chopper without software protection. An external
thermal protection device should be fitted
Enabled With Software Protection
As setting 1, however the Brake Chopper is only enabled during a change of the
frequency setpoint, and is disabled during constant speed operation
Enabled Without Software Protection
As setting 2, however the Brake Chopper is only enabled during a change of the
frequency setpoint, and is disabled during constant speed operation.
Analog Input 1 Scaling / Slave Speed Scaling
Analog Input 1 Scaling. The analog input signal level is multiplied by this factor, e.g. if P-16 is set for a 0 – 10V signal , and the scaling
factor is set to 200.0%, a 5 volt input will result in the drive running at maximum frequency / speed (P-01)
Slave Speed Scaling. When operating in Slave Mode (P-12 = 9), the operating speed of the drive will be the Master speed multiplied
by this factor, limited by the minimum and maximum speeds.
Serial Communications Configuration
Index 2 : Baud Rate & Network Type
Index 3 : Modbus RTU / Optibus Communication loss timeout protection
This parameter has three sub settings used to configure the Modbus RTU Serial Communications. The Sub Parameters are
Index 1 : Drive Address : Range : 0 – 63, default : 1
Index 2: Baud Rate & Network type: Selects the baud rate and network type for the internal RS485 communication port.
For Modbus RTU: Baud rates 9.6, 19.2, 38.4, 57.6, 115.2 kbps are available.
For CAN: Baud rates 125, 250, 500 & 1000 kbps are available.
Index 3: Modbus RTU / Optibus Communication loss timeout protection: Defines the time for which the drive will operate without
receiving a valid command telegram after the drive has been enabled. This applies to Modbus RTU networks and Optibus networks
(e.g. keypad control or Master Slave operation) only. CAN communication loss function is enabled via CAN objects 100Ch and 100Dh.
Setting 0 disables the Watchdog timer. Setting a value of 30, 100, 1000, or 3000 defines the time limit in milliseconds for operation.
A ‘’ suffix selects trip on loss of communication. An ‘’ suffix means that the drive will coast stop (output immediately disabled) but
will not trip.
Defines the access code which must be entered in P-14 to access parameters above P-14
All parameters can be accessed and changed
Parameter values can be displayed, but cannot be changed except P-38.
Sets an offset, as a percentage of the full scale range of the input, which is applied to the analog input signal. This parameter
operates in conjunction with P-35, and the resultant value can be displayed in P00-01.
The resultant value is defined as a percentage, according to the following :-
P00-01 = (Applied Signal Level(%) - P-39) x P-35)
Index 1 : Display Scaling Factor
Index 2 : Display Scaling Source
Allows the user to program the Optidrive to display an alternative output unit scaled from either output frequency (Hz), Motor
Speed (RPM) or the signal level of PI feedback when operating in PI Mode.
Index 1: Used to set the scaling multiplier. The chosen source value is multiplied by this factor.
Index 2 : Defines the scaling source as follows :-
Scaling is applied to the output frequency if P-10 = 0, or motor RPM if P-10 > 0.
Scaling is applied to the motor current value (Amps)
Analog Input 2 Signal Level
Scaling is applied to analog input 2 signal level, internally represented as 0 – 100.0%
Scaling is applied to the PI feedback selected by P-46, internally represented as 0 – 100.0%
PI Controller Proportional Gain
PI Controller Proportional Gain. Higher values provide a greater change in the drive output frequency in response to small changes
in the feedback signal. Too high a value can cause instability
PI Controller Integral Time
PI Controller Integral Time. Larger values provide a more damped response for systems where the overall process responds slowly.
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