The SEL-E/G Controller has been moved to the obsolete archives.

Q: The actuators have been connected, the I/O powered up, the brake connected and creep sensor plugged in, When we try to home the system, we come up with an 'A4' error on the controller.

A: Check to see that the slide is not past the creep sensor in the direction of the homing hard stop. For example, if your creep sensor is installed on the motor end, and the slide is between the sensor and the motor-end hard stop, you'll get the A4 error.

Q: The actuators have been connected, the I/O powered up, the brake connected and limit switches plugged in, When we try to home the system, we come up with an 'EG' error on the controller.

A: Check to see that the slide is not past either limit switch sensor. As long as the slide is between the two limit switch sensors, you'll be able to home.

Q: We've got a single-axis 200W AC SuperSEL E controller. We don't have a brake on the axis, but there is an extra connector on the controller labeled 'RB'. We couldn't find what plugs in to that connector, so we ran the units. After a while, the 'A1' error shows up on the front of the controller.

A: The 'RB' connector stands for "Bleeder Resistor" or "Regenerative Box". Without the external regenerative box connected to your controller, the A1 error will appear showing "over regenerative current" on the driver module. This external box bleeds the extra voltage away from the controller. If a brake were present, the bleeder resistor is included in the brake box.

Q: What's the difference between wiring for the NPN I/O card and PNP IO card?

A: The main difference is that the power connection for Power (+24V) and Common (0V) are switched. On the NPN I/O card, the power connection is on pin 1A (Brown) and the common is on 25B (Black). The PNP card is the exact opposite from the NPN card.

Q: The system will run fine for a while, but when our ultrasonic welding unit fires up, the controller's display blanks out and the program "freezes" up.

A: You may have a noise problem. The ground of your I/O cable must be tied independently to the main ground, and not linked to an external device's ground. If this is the case, make sure you have DC diodes installed across the coils of your DC relays, or if you have AC relays, an RC snubber. Better shielding of the I/O cable or re-routing may also be needed.

Q: Is it possible to have both the limit switch option and creep sensor option on the same controller?

A: No. Internally to the controller there exists no circuitry that would allow for this combination to occur. The parameters are set up to accept either creep or limit switch, not both.

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