Scale Error 2126 (Error 55 in Qbit Software)
A Scale Error 2126 (Error 55 in Qbit Software) will be displayed when the scale is unable to zero properly for an extended period of time. In this case 7 seconds is allowed to pass with no packages passing through the machine. If the scale cannot zero in this period of time, then the 2126 error is displayed, and the alarm will beep. The Green light will also fail to light up on the top of the machine. The following are examples of likely causes for this condition. Sometimes it is more than one of them at the same time.
This condition is usually caused by something being added to or removed from the scale assembly. These can be items set on the sides of the machine, conveyor touching at the entry or exit ends of the machine, or the lower width cover assembly being removed from the machine and not put back in (See below). The lower width cover is part of Scale C and weighs several pounds. The machine will not be able to return to zero if this is removed from the system. Remove/Correct whatever condition may be interfering with the normal operation of the scale(s) and press the red zero button on the button panel to the right of the touchscreen. This should clear out the issue.
Another possibility is a change to cabling connected to the machine. This isn't all that uncommon, and most of the time whoever is doing the work doesn't know its a scale they are messing with. Cables should be bundled neatly, and in a way that doesn't pull or push on the scale portions of the machine. Once the cables have been worked over and secured, the scale will need to be calibrated to account for the change in weight.
If the above suggestions do not resolve the problem, there are a couple of potential causes deeper in the machine...
As pictured below, at times the Scale B conveyor is able to shift slightly on the load cells, and it will touch at the point indicated with the red arrow. This allows the larger Scale C part of the machine to touch Scale B. It's amazing how much this can affect Scale B's performance. Check that point. If the bracket is touching the frame of scale B, carefully lift the Scale B conveyor and shift it away from that corner. Be sure to lift all four corners to ensure that there are no side loads created on the load cells as you move the conveyor around. This is good practice whenever you do a PM on a CS200-TS, or new installation or PM of the CS200SQ machines. Doing this prior to calibration of the equipment will help avoid a lot of scale troubles. Side loads cause the strangest problems at times. Lifting each corner straight up and letting it back down will eliminate side loads.
One of the more serious causes for scale failure is damage to the load cell (Weight Sensor) cable(s) This typically occurs in the area where the width sensor cover is removed and reinstalled in the machine frequently. At times it is not placed back on track properly and is rammed into the cables on the sides of the load cells. One good hit can damage the cable, and make Scale B inoperable. When replacing these factory installed load cells, be sure to spin them 180 degrees so the cable is on the opposite/far side. This makes it much less likely to take a hit in the future. You will need to move any metal bumper components over to the new load cell as part of the process, and soldering to the scale card is required. At times slight load cell circuit balancing may be needed. Go prepared for this type of repair. You will need to support the corner of the conveyor that you are working on to get the load cell out. Using the original shipping bolts is one of the easier ways. A properly placed Crescent wrench can also do the job of holding the corner for you. (see the last picture, lower right corner)
