Drives Service & Support > 1336T > FAQ

(Note: The Impact and Force FAQs are the same, since they have many similarities)

1. Why is my 1336E drive tripping on F1027 [Autotune Diag] during the auto-tune procedure?
2. In the 1336E and 1336T drives, what is a link and how do I make one?
3. How do I program the 1336IMPACT to run above Base Motor Speed?
4. What type of encoders can I use on the 1336IMPACT drive?
5. Why can I not run multiple motors on a 1336 IMPACT?
6. When issuing the autotune on the 1336E and I get a warning indicated as "Hardware stop input asserted".
7. I have four fans on a blower system that I want to run off one drive, we have a spare 1336 Impact drive in our mill, can I use that drive to run all four (4) fans?
8. I want to customize my volts/hertz on my 1336 Impact drive, where do I do that?
9. If we have a 2 Volt offset programmed in the analog output, is that offset present when the drive has stopped?
10. I noticed that P260 [Iq Offset] and P261 [Id Offset] logged values after the transistor diagnostic test portion of the auto-tune had been completed. Why did these values change?
11. What is the difference in choices 0 and 1 in P150[Feedback Device Type]?
12. When and how would you use P152[Feedback Filter Select]?
13. How practical are the values of the velocity loop Ki, Kp, and Kf received from the auto-tune?

1.
Q? Why is my 1336E drive tripping on F1027 [Autotune Diag] during the auto-tune procedure?
A! Autotune Diag can occur for several different reasons. To find out why the F1027 occurred, do not clear the fault yet. First determine what test the fault occurred on. Look at parameter 173[Autotune/Dgn Sel]. The least significant bit that is still set to one in parameter 173 is the test that was executing when F1027 occurred. Next look at what bits are set in parameter 176[Autotune Errors] to find out why that test failed. Chapter 11 of the 1336 Impact User Manual gives a basic description of why the bit in p176 is set. See Chapter 13 of the 1336 Impact User Manual for a more complete understanding of the auto-tuning procedure and reasons for F1027 to occur.

2.
Q? In the 1336E and 1336T drives, what is a link and how do I make one?
A! A link is a connection between two parameters that takes the value in one parameter (source) and writes that value into another parameter (destination). The parameter containing the original information is the source parameter. The parameter receiving the information is the destination (also known as the sink) parameter. In this example we will link parameter 139[SP An Output] to parameter 86[Motor Torque %]. [SP An Output] is the value displayed on the HIM when you escape from the menus. To make a link with the HIM module press up or down to go to the Choose Mode prompt. Continue to press the up or down key, and press enter at the menu Links. Press the up or down key and press enter at the menu Set Links. Then press the up or down key until you get to the destination parameter, which is parameter 139 in this example, and press select. Press the up and down error keys to get to the source parameter displayed on the right, which is parameter 86 in this example, and then hit the enter key. After pressing enter, the destination parameter, parameter 139, should show up on the left side of the display and the source parameter, parameter 86, will show up on the right. Press ESC to exit the menus and now parameter 86[Motor Torque %] will be displayed on the HIM.

3.
Q? How do I program the 1336IMPACT to run above Base Motor Speed?
A! The speed reference scaling will need to be changed. Example: Analog Input 1 is being used as the speed reference. By default the scale is set to 2.00 and the maximum output of the A/D is 2048, so that provides a value of 4096 to the input of the speed regulator. 4096 drive units are equal to the base speed of the motor. Since 2048 is the maximum the A/D can provide, the scale must be increased to provide a larger value to the speed regulator. If the base speed of the motor is 1750 rpm and the maximum desired speed is 2187.5rpm (125% of base speed), the scale will need to be increased to 2.50 or 1.25 X 2.00. 2. The Forward and Reverse Speed Limits need to be increased to the maximum desired speed. This parameter is programmed in motor rpm, so for the above example, these limits will need to be increased to 2188rpm and –2188rpm.

4.
Q? What type of encoders can I use on the 1336IMPACT drive?
A! The Impact drive needs an Incremental, dual channel encoder; isolated with differential transmitter. 100 kHz maximum, quadrature: 90 degrees +/- 27 degrees. 2. The fault detection circuit in the Impact drive monitors all four input channels of the encoder. If any of the channels have no input, the drive will fault on a Spd Fdbk Loss (05048) fault.

5.
Q? Why can I not run multiple motors on a 1336 IMPACT?
A! The 1336 IMPACT drive is a Field Oriented Control using the patented FORCE Technology and as such uses data from the motor to determine the active current and excitation current values. More than one motor connected will give wrong data to the drive and cause the control to output less than optimum currents to the motor.

6.
Q? When issuing the autotune on the 1336E and I get a warning indicated as "Hardware stop input asserted".
A! It seems to be worded strangely and reworded it can read "stop input TB3(20) missing". In other words, make TB3 terminal 20 (stop input) true, then try the autotune again.

7.
Q? I have four fans on a blower system that I want to run off one drive, we have a spare 1336 Impact drive in our mill, can I use that drive to run all four (4) fans?
A! No, the Impact drive can only be used with one motor.

8.
Q? I want to customize my volts/hertz on my 1336 Impact drive, where do I do that?
A! This is not a volts/hertz drive and there is no adjustment to be made.

9.
Q? If we have a 2 Volt offset programmed in the analog output, is that offset present when the drive has stopped?
A! Yes, that offset will be in the analog output while the drive is stopped.

10.
Q? I noticed that P260 [Iq Offset] and P261 [Id Offset] logged values after the transistor diagnostic test portion of the auto-tune had been completed. Why did these values change?
A! P260[IQ Offset] and P261[Id Offset] are always updated when you perform the inverter diagnostic test. Those parameters are just the offsets for the current transducers.

11.
Q? What is the difference in choices 0 and 1 in P150[Feedback Device Type].
A! There is no difference between them.

12.
Q? When and how would you use P152[Feedback Filter Select]?
A! P152 is simply a filter for the velocity feedback. It can be implemented in encoderless or encoder operation. It acts like a time delay to filter out high frequency changes in the velocity feedback.

13.
Q? How practical are the values of the velocity loop Ki, Kp, and Kf received from the auto-tune?
A! P139 [Ki Velocity Loop], P140 [Kp Velocity Loop], and P141 [Kf Velocity Loop] are simply a starting point determined by the auto-tune. The values from the auto-tune are usually conservative values. Most times, the auto-tune values for Ki, Kp, and Kf are acceptable, but they can be adjusted to get good speed response for your particular application.