Allen Bradley 1336 PLUS Inverter Practical Guide

It is strictly prohibited to connect power factor compensation capacitors or surge suppressors on the output side.

If a contactor needs to be installed on the output side, it must be ensured that the inverter output is blocked through auxiliary contacts when the contactor is disconnected, otherwise the inverter will still output dangerous voltage.

Control and signal wiring: precise interface configuration

1336 PLUS offers multiple control interface options: TB2 terminal block (standard analog/digital I/O) and optional control interface board TB3 (L4/L5/L6 and L4E/L5E/L6E with encoder feedback).

1. TB2 terminal (standard control signal)

Terminal signal description

1, 2, and 3 external speed potentiometers (10k Ω) provide 0-10V settings

4,5 0-10V analog input impedance 100k Ω

4-6 4-20mA analog input impedance 250 Ω

7,8 pulse input 5V TTL, maximum 125kHz, used for frequency setting or encoder feedback (choose one)

9. Analog output 1 can be jumper selected from 0-10V or 0-20mA, monitor output frequency or current

10-11, 11-12, 13-14-15, 16-17-18 Programmable Relay Output (CR1-CR4) Resistive Load 5A/115V AC or 30V DC, Inductive 2A

2. TB3 Control Interface Options (Input Mode)

TB3 selects different control combinations through the [Input Mode] parameter (P21), supporting two-wire system, three wire system, multi-stage speed, jog, PID enable, etc. Common modes include:

Mode 1 (default): 2-wire forward/reverse start, stop/fault reset, auxiliary input (normally closed, reports F02 Aux Fault when disconnected).

Mode 2/3/4: Three wire start/stop button control.

Mode 7/8/9: Multi speed selection (up to 7 preset frequencies).

Modes 12-16: Includes digital potentiometer (MOP) acceleration and deceleration control.

Important: After modifying the [Input Mode], the inverter power must be completely disconnected and the bus voltage must be reset to zero before the new configuration can take effect after being powered on again.

3. Encoder feedback wiring (L4E/L5E/L6E options)

The encoder must be line driven (5V TTL or 8-15V), supporting single ended pulse or differential orthogonal signals, with a maximum frequency of 125kHz. The wiring terminals are 31-36 of TB3. The encoder power supply voltage (5V or 12V) needs to be selected through jumper JP3/JP4. When using encoder feedback, the [Speed Control] parameter must be set to "Encoder Fdbk" (value 4), and [Pulse/Enc Scale] must be set to the number of pulses per revolution of the encoder.

Parameter programming logic and detailed explanation of key parameters

1336 PLUS groups hundreds of parameters by function, greatly simplifying debugging. The main groups include: Setup, Advanced Setup, Frequency Set, Feature Select, I/O Config, Faults, Motor Control, etc.

1. Basic operating parameters (Setup group)

Parameter Range Factory Value Description

[Minimum Freq] (P16) 0-120Hz 0Hz Minimum output frequency

[Maximum Freq] (P19) 25-400Hz 60Hz Maximum output frequency, cannot be changed during operation

[Accel Time 1] (P7) 0.0-3600.0s 10.0s Acceleration time (0Hz → [Maximum Freq])

[Decel Time 1] (P8) 0.0-3600.0s 10.0s Deceleration time

[Top Select 1] (P10) Coast/DC Brake/Ramp/S Curve/Ramp to Hold Coast Stop Method

[Current Limit] (P36) 20-160% 150% current limit amplitude

[Overload Amps] (P38) 20-115% drive rated 115% motor thermal overload protection current (set as motor nameplate FLA)

2. Sensorless vector control and V/f selection

For firmware versions 4.01 and above, select the control mode through [Control Select] (P9):

Sens Vector (default): sensorless vector control, providing high starting torque and speed accuracy.

Economy: Energy saving mode, automatically reduces output voltage under light load.

Fixed Boost: V/f control with fixed voltage boost.

Full Custom: Customize the V/f curve by setting [Break Frequency]/[Break Voltage], [Base Frequency]/[Base Voltage], etc.

In sensorless vector mode, to improve performance, the motor nameplate parameters should be input: [Motor NP Amps] (P191), [Motor NP Volts] (P190), [Motor NP Hertz] (P178), [Motor NP RPM] (P177). Automatic tuning can also be performed (manually recorded through [Flux Amps Ref] and [IR Drop Volts]).

3. Frequency given source and multi-stage speed

The frequency source is determined by [Freq Select 1] (P5), [Freq Select 2] (P6), and Speed Select input (TB3). Default [Freq Select 1]=Adapter 1 (i.e. HIM), [Freq Select 2]=Preset 1. By combining Speed Select 1/2/3, 7 preset frequencies ([Reset Freq 1-7]) can be called.

Practical tip: If using a 4-20mA signal as a given, you can enable [4-20mA Loss Sel] (P150) to define the behavior when the signal is lost (stop, hold, switch to minimum frequency, etc.).

4. Flying Start

Used to capture motors in free rotation and avoid overcurrent faults. Enable through [Flying Start En] (P155), with options for "Speed Search" (search starting from maximum frequency or set frequency), "Use Encoder" (use encoder), or "Track Volts" (detect residual voltage). Set the search start frequency in conjunction with [FStart Forward] and [FStart Reverse].

5. Process PID Control (Process PI)

When [Speed Control] (P77) is set to "Process PI" (value 7), the frequency converter can be used as a process controller. Set the source [PI Ref Select] (P215) and feedback source [PI Fdebk Select] (P216) to choose from 0-10V, 4-20mA, pulse, MOP, etc. The proportional gain [KP Process] (P222) and integral gain [KI Process] (P221) are adjustable, and the output is limited to [PI Pos/Neg Limit] (P224/P223). It is also possible to configure integrator preloading, reverse output, etc. through [PI Config] (P213).