Analog command input – Rockwell Automation 2090 Ultra3000 Installation Manual User Manual

Page 79

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Publication 2098-IN003E-EN-P — April 2004

Ultra3000 Connector Data

2-37

Analog COMMAND Input

The COMMAND input to the drive can provide a position, velocity, or
current command signal. A 14 bit A/D converter digitizes the signal.
The configuration of the input is shown in Figure 2.34.

Figure 2.34
Analog COMMAND Input Configuration

The following table provides a description of the analog COMMAND
input specifications.

10k

Ω

10k

Ω

20k

Ω

20k

Ω

1000 pF

1000 pF

0.01

μF

COMMAND +

COMMAND -

0.01

μF

10k

Ω

10k

Ω

Ultra3000 Drive

Parameter

Description

Minimum

Maximum

Resolution

Number of states that the input signal is divided into
which is 2

(to the number of bits)

.

14 bits

Input
Impedance

Open circuit impedance measured between the + and
- inputs.

20 k

Ω

Input Signal
Range

Voltage applied to the input

-10V

+10V

Offset Error

Deviation from the correct value expected from
analog-to-digital conversion when 0V is applied to the
input.

50 mV

Gain Error

Deviation of the transfer function from unity gain,
expressed in a percent of full scale.

1%

Propagation
Delay

Delay from the input to the firmware-accessible
registers.

100

μS

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