AMCI NEXUS NX2A4E2 User Manual Download Page 19

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NX2A4E2 User Manual

ATA

ORMATS

Output Data Formats (continued)

Single Resolver Data Format (continued)

Command Word 0 (continued)

Bit 01:

Apply_Preset2 –

When set to “1”, the module sets the CH2 position to the value of the CH2 Preset

Value parameter. The CH2 Preset Value has a factory default value of zero. The CH2 Preset Value can
be programmed by setting the Setup_CH2 bit (bit 05 of this word) and putting the desired CH2 Preset
Value in Word 7. Please note that applying the preset value, and programming the CH2 Preset Value
parameter, are two independent processes. They can be accomplished in the same transmit cycle, but
do not have to be. Also note that the ApplyPreset bits are not exclusive. All four channels can be pre-
set together in one programming cycle.

Bit 00:

Apply_Preset1 –

When set to “1”, the module sets the CH1 position to the value of the CH1 Preset

Value parameter. The CH1 Preset Value has a factory default value of zero. The CH1 Preset Value can
be programmed by setting the Setup_CH1 bit (bit 04 of this word) and putting the desired CH1 Preset
Value in Word 7. Please note that applying the preset value, and programming the CH1 Preset Value
parameter, are two independent processes. They can be accomplished in the same transmit cycle, but
do not have to be. Also note that the ApplyPreset bits are not exclusive. All four channels can be pre-
set together in one programming cycle.

Setup Word 1

These bits are only acted upon when one, and only one, of the Channel Setup bits (bits 07 -04) of Word 0 is
set to “1”.

Figure R2.3 Single Turn Setup Word Format

Bit 08:

Enable ChLED –

This bit can be used to disable the channel’s front panel status LED. (The channel

itself remains active and transmits fault information to the host controller.) When this bit is a “0”, the
LED is disabled. When this bit is set to “1”, the LED is active, and shows the state of the channel.
This bit is commonly used to disable the Status LED of unused channels.

Bit 03:

ResType –

This bit is only acted upon when programming channel 1. Setting this bit to “1” when pro-

gramming any other channel will result in a Configuration Error response from the NX2A4E2. When
set to “0”, the NX2A4E2 configures itself to use AMCI transducers. When set to “1”, the NX2A4E2
configures itself for transducers from Autotech or Gemco.

Bit 02:

TachResponse –

This bit sets the Tachometer Response time for the channel. This is the time

between tachometer data updates. When set to “0”, the tachometer response time is set to 120 milli-
seconds. When set to “1”, the tachometer response time is set to 24 milliseconds.

Bit 01:

XFltLatch –

When set to “0”, the transducer fault latch is disabled. Transducer faults will clear them-

selves as soon as valid signals are detected on the channel’s inputs. When set to “1”, the transducer
fault latch is enabled. Transducer faults are latched, and can be cleared by issuing a programming
block with the Reset_Errors bit (Word 0: Bit 14), set to “1”.

Bit 00:

CountDir –

When the transducer is wired to the module as shown in this manual, set this bit to “0” for

CW increasing counts when looking at the transducer’s shaft. Set this bit to “1” for CCW increasing
counts. Note that count direction can also be switched by reversing pair connections on the transducer
input connector. Changing direction with wiring changes is covered in the Installation chapter of this
manual.

RESERVED: Bit must equal zero.

Setup Word (1)

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

chR

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