NAI-79C3-SF6

SimWB supports the following modules on the North Atlantic Industries 79C3 card.

• SF (4-channel measurement)
• 6D (3-channel resolver output)
• W2 (Reference module used to provide an AC signal source)

Reference Information

I/O Card Model Number

NAI-79C3SF6DZ0.

I/O Driver Model Number

WCS-###-####

I/O Module License:

ICS-SWB-1217.

Mapping Table

Channel

Channel number.

Module

Module name, specified for each of the three modules in the card.

SF

4-channel resolver/synchro measurement (input) module.

Angles are measured in the [0, - 359.9954]° range. Rotation speed is returned in the [-190.7348, +190.7348] RPS range.

6D

3-channel resolver output module.

Angles are written in the [0, - 359.9954]° range. If you provide values outside this range, the I/O task issues a warning and reduces the values to within the range. Rotation speed is specified in the [-4896, +4896]°/second range.

W2

Reference AC signal source module.

If this module is enabled, then its power supply is enabled during the initialization phase of the nai79c3sf6in/nai79c3sf6out I/O task(s). The power supply is disabled during the termination phase of the nai79c3sf6in/nai79c3sf6out I/O task(s). If an RTDB contains points mapped to input and output modules on the card, then the nai79c3sf6out task disables this module.

Z0

No module.

Mode

Indicates whether the channel is connected to a resolver/synchro.

Type

Position

Measure/output angle.

Rotation

Measure/output rotation speed.

Max RPS

Maximum rotations per second (Rotation channels only).

The maximum rotations per second the board can track is 190.7348 RPS. If the actual input range is going to be less than that, the velocity scale register can be used to improve the resolution of the velocity register. The scale factor is calculated as follows:

Due to the 12-bit quantization of the velocity scale register, the actual maximum RPS may differ slightly from the desired value. Care should be taken to use the actual maximum RPS in engineering unit conversions.

Vref

Minimum reference voltage level expected before indicating a loss.

Vsig

Minimum signal voltage level expected before indicating a loss.

W2 Enable

Specifies whether the W2 module is enabled or disabled. Only applicable to W2 modules.

Enable

Enables W2 module. Sets the reference voltage and reference frequency values to their minimum values by default. Update these values as required.

Disable

Disables W2 module.

RefAmpl

Reference voltage, specified in the [2 28]V_rms range. Default value is 15 V_rms when W2 module is enabled. Only applicable to W2 modules.

RefFreq

Reference frequency, specified in the [47 Hz 10Khz] range. Default value is 5023.5 Hz when W2 module is enabled. Only applicable to W2 modules.

If you use the W2 module as the reference for the SF module, then you must configure the frequency to be within the range supported by both modules.

Mapped Point(s) Column

Input/output point(s) a channel is mapped to. To map a point to a channel, select a channel on the left side of the I/O Mappings form, then click on a check box for an I/O point on the right side of the form. See I/O Mappings... for details.

Synchronous I/O Tasks

nai79c3sf6in

This I/O task is used when the RTDB specifies mappings to the input channels on this card. The W2 module enable/disable is handled by this I/O task.

nai79c3sf6out

This I/O task is used when the RTDB specifies mappings to the output channels on this card. The W2 module enable/disable is handled by this I/O task.

Connector Map

Slot 1

Slot 2

Slot 3