Automatic Devices Company

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LogiStop® FAQ

What is a LogiStop®?

A LogiStop® control provides anywhere from 1 to 20 precise preset stops that can be programmed in 3 keystrokes and accessed via remote control stations, DMX controllers, RS232 Emulators or automation outputs.

Can the LogiStop® be used with machines other than Automatic Devices Company manufacture?

The LogiStop® was designed for use with ADC as well as other manufacturers' machines. The control will work with most machines that have a rotating output shaft that operates between 0 and 35 rpm.

What is included with the standard LS-1 (LogiStop®) control?

The standard LogiStop® control is comprised of the LogiStop® control board mounted inside of a NEMA 1 control box, and a limit/encoder assembly that includes a rotary encoder and 2 ultimate mechanical limit switches.

How do I make the LogiStop® operate my machine?

The LogiStop® is provided with 3 form C relay outputs, one for OPEN, one for CLOSED and one for a mechanical brake (if needed). These outputs get connected to your machine's control contactor, DC drive card, or frequency drive module. The LogiStop® handles all of the positioning control and signals the output relays to open and close according to the needed function from the machine. Note that the relay outputs of the LogiStop® are not designed to carry motor voltage or current and an intermediate device such as a contactor or drive card is needed to isolate the LogiStop® board from the motor voltage and current.

How is the encoder assembly attached to my machine?

The encoder/limit assembly of the LogiStop device is provided with a right angle mounting bracket for attachment to the machine. The device is driven via a #25 chain sprocket provided on the input shaft of the assembly. The assembly must be driven by the slow speed shaft of the machine, normally the output shaft of the gear reducer. A #25 sprocket is mounted to the slow speed shaft and a continuous chain loop is connected between the encoder/limit assembly and this sprocket.

How far can the encoder/limit be located from the LogiStop® board?

Standard LogiStop units use low voltage encoder signals and so the distance between the encoder and the LogiStop board is limited to 4 feet. If a greater distance is required an optional driver can be added to the encoder which increases this distance to about 200 feet.

Can I remove the keypads from the control box and mount them remotely?

No. The keypads plug into a low voltage input to LogiStop® board and cannot be remotely located, however we do offer a remote control station (RCS-LS1) that utlilizes similar keypads and offers the same features.

Will I lose my presets if power to the LogiStop® is lost?

No. The LogiStop® utilizes EEPROM so that any values programmed will not be lost if power is removed from the device.

What type of control circuit does the LogiStop® use?

The LogiStop® utilizes a 12-volt DC Class 2 control circuit.

Are the inputs isolated from the main board?

Yes. Optical isolators are used on all control inputs.

How far away from the LogiStop® board can I locate my remote controls?

Remote controls can be located up to 1000 feet from the LogiStop® board, provided large enough wire is used and the circuits are protected from induced signals.

What type of input signals do I need to provide to the LogiStop®?

The LogiStop® is designed to work from normally open, momentary operating contact closures. Any number of remote controls can be used. Simply wire the contacts in parallel with each other.

Can the LogiStop® be programmed from a remote station?

Yes, if the DIP switch option for this feature is turned on.

What is the Power Loss lockout feature?

The LogiStop® control is provided with a circuit that monitors line power. In the event of a loss of power the LogiStop® enters a locked-out state and cannot be run locally or remotely until the unit is reset. This feature is provided to insure that the physical position of the device the LogiStop® is operating is in the correct position. The operator must manually reset the LogiStop® board, presumable after checking the position of the output device, before it will run again. A loss of power is indicated by a red LED. This LED remains lit after a loss of power, once it is restored, until the unit is reset.

Can I jog the machine to positions between the preset stops?

Yes. As long as power is present at the LogiStop®, it will continually monitor the position of the device and locate a predefined stop when a preset button is pressed.

What are the Ultimate Limits used for?

The LogiStop® encoder/limit assembly includes two mechanical limits that are designed to be wired in series with the machine's motor operating device, such as a contactor, DC drive, etc. The limits must be wired such that if they are activated, the switches will bypass the LogiStop® outputs and shut the machine off directly. The switches can be wired for normally open or normally closed operation.

Can I connect more than 1 machine to a single LogiStop® control?

No. Only 1 machine can be operated per LogiStop® control.

Is there a communication bus that will allow multiple LogiStops® to be connected together?

No. Right now the LS-1 is a stand-alone device. This may change in the future. Check this site periodically for updates.

What will affect the precision of the LogiStop control?

Two things can affect the LogiStop's precision:

  • RPM to the encoder.
  • If the output drive device of the machine, drum, sprocket, etc. has a large diameter or is connected to an output with a large pulley ratio, the device will appear to have a loss in precision. Actually the LogiStop® is stopping with the same degree of accuracy, but the large diameter is amplifying the small degree of imprecision.

Can I use a variable speed machine with the LogiStop?

Yes. Provided the maximum rpm attained does not exceed 35. Note that deceleration ramps cannot be used.

Can the LogiStop be set up for use on a 220 Vac circuit?

Yes. The LogiStop can be configured at the factory for use on a 220 Vac, 60 Hz power source.