Allen Bradley 1336 PLUS Inverter Practical Guide

Key points for operating Human Machine Interface (HIM)

The 1336 PLUS is equipped with a detachable HIM (with LCD display and control keys). Key operating modes:

Status Display: By default, it displays "Stopped" and output frequency.

Program Mode: Press Enter and select "Program" to enter the parameter group for modification.

Display Mode: Only view parameters and cannot be modified.

Process Mode: Customize the display of two user parameters (set through [Process 1/2 Par] and Scale).

EEPROM Mode: Reset to factory settings or parameter upload/download (Series B HIM only).

Password Mode: Set a 5-digit password to prevent unauthorized parameter modification.

Note: If HIM is removed and the corresponding bit of [Logic Mask] is "1", the frequency converter will report a "Serial Fault". To hot plug HIM, first set the corresponding bit of [Logic Mask] to "0" or disable the control logic through the Control Status menu.

Start debugging process (standard steps)

Chapter 4 of the manual provides a detailed start-up process, with key steps summarized as follows:

Pre power on inspection: Confirm that the main circuit power supply voltage meets the rated value of the frequency converter; Disconnect the motor load; Confirm that the control terminals stop/enable/auxiliary inputs are all closed.

Power on: HIM displays "Stopped". If a fault is reported, record the code and troubleshoot.

Set basic parameters: Enter [Maximum Freq], [Minimum Freq], acceleration and deceleration time, and motor nameplate parameters.

Select control mode (sensorless vector or V/f).

No load test: Start with HIM, set the frequency, and observe whether the output frequency follows. Check if the forward and reverse directions are correct.

Connect the motor load: Reconnect the motor and confirm the rotation direction during low-speed operation. If the direction is incorrect, swap any two output lines (U, V, W).

Encoder polarity check (if used): Compare the polarity signs of [Pulse/Enc Hertz] and [Output Freq], and if they are opposite, swap the A/A - or B/B - wiring.

Sensorless vector tuning: Disconnect the motor from the load, set 45Hz, and record [Flux Current]; Given 0Hz, record [Output Voltage]. Fill in the recorded values in [Flux Amps Ref] and [IR Drop Volts].

Set electronic thermal overload: [Overload Amps] set to motor nameplate FLA, [Overload Mode] select the derating factor (2:1, 4:1, or 10:1) based on the speed range.

Save and exit: If password protection is enabled, execute Logout.

Fault code diagnosis and handling

The 1336 PLUS has a comprehensive fault protection function, and all faults will display brief text on the HIM, while the fault relay will act (CR3, default). The common faults and troubleshooting are as follows:

Common causes and solutions for fault display codes

Auxiliary Fault F02 TB3-24 Auxiliary Input Open Circuit Check External Safety Circuit; If this function is not used, ensure that [Input Mode]=1

Power Loss Fault F03: If the DC bus is below 85% for more than 500ms and [Line Loss Fault] is enabled, check if the input power supply is briefly interrupted; Adjust according to demand [LLoss Restart]

Overvoltage Fault F05 DC bus overvoltage (200V level>405V, 400V level>810V) prolongs deceleration time; Install braking resistor or braking unit

Motor Stall Fault F06: If the current exceeds 150% for 4 seconds, check if the load is stuck; Increase acceleration time

Overload Fault F07 motor overload (I ² t accumulation) reduces load; Check if the [Overload Amps] setting is too low

Overtemp Fault F08: Heat sink temperature>90 ° C, clean the heat sink; Check the cooling fan; Reduce the ambient temperature

Open Pot Fault F09 External Potentiometer Common Terminal Open Circuit Inspection TB2-1/2/3 Wiring

Overcurrent Fit F12 output instantaneous overcurrent (about 200-300% rated) check for output short circuit and grounding; Check the insulation of the motor; Extend acceleration time

Ground Fault F13 output leakage to ground>100A Check motor and cable insulation to ground

Precharging Fault F19: Input voltage check for incomplete pre charging circuit; Check the pre charging resistor/thyristor

Hertz Err Fault F29 with no effective operating frequency (such as maximum frequency less than minimum frequency, or frequency hopping interval covering all frequencies) check [Maximum Freq], [Minimum Freq], [Skip Freq] settings

Serial Fault F10 SCANPort device disconnected, but [Logic Mask] allows control. If hot plugging is required, set the corresponding adapter mask bit to 0

Replace the bus fuse of Blwn Fuse Fit F58 30kW and above machine frame and check if the IGBT is short circuited

The fault can be cleared through the following methods: power off and restart, HIM's Stop button (with [Flt Clear Mode] enabled), external fault reset input, or sending a clear command through communication. Partial faults (such as overcurrent and grounding) cannot be automatically reset, and hardware issues need to be eliminated.

Special Features and Application Examples

1. Skip Frequency

Used to avoid mechanical resonance points. Set [Skip Freq 1-3] (P32-34) and [Skip Freq Band] (P35), the frequency converter will not continuously stay in this frequency range during operation, but will smoothly pass through during acceleration and deceleration.