AMCI NEXUS NX2A4E2 User Manual Download Page 26

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ATA

ORMATS

NX2A4E2 User Manual

ADVANCED MICRO CONTROLS INC.

Input Data Formats (continued)

Single Resolver Data Format (continued)

Channel Status Word (continued)

Bit 05:

Preset_Err –

This bit is set to “1” when you attempt to program the channel’s Preset Value parameter

outside its valid range of Linear Offset to (Linear Offset - (Full Scale Count – 1)).

Bit 04:

LinearOffset_Err –

Set to “1” when you attempt to program the channel’s Linear Offset parameter

outside its valid range of 0 to (32,767 - Full Scale Count).

Bit 03:

FSC_Err –

This bit is set to “1” when you attempt to program the channel’s Full Scale Count param-

eter outside its valid range of 2 to 8,192 counts per turn.

Bit 00:

Config_Err –

This bit is set to “1” if any of the reserved bits are set to “1” when the channel is pro-

grammed.

Dual Resolver Data Format

Each Data Block contains the data for one dual-resolver transducer channel. Note that if the first two channels
are programmed as single-resolver interfaces, the data in input words 0 through 7 will follow the

Single

Resolver Data Format

that is found on page 25. The same is true for words eight through fifteen if the last

two channels are programmed as single-resolver interfaces.

Channel Status Word

Figure R2.7 below shows the format of the status word for a single resolver transducer channel. Note that the
Acknowledge bit, bit 15, is only available in word zero. This is bit 15 of the CH1 Status Word.

Figure R2.8 Single Resolver Channel Status Word Format

Bit 15:

Acknowledge –

Used to control the flow of programming data to the NX2A4E2. The NX2A4E2 sets

this bit in response to the Transmit bit being set by the host. Programming error bits in the Channel
Status word is only valid while the Acknowledge bit is set. Once this bit is set, it will remain set until
your host controller resets the Transmit Bit.

Bit 14:

Module_Fault –

Set to “1” if there is a hardware fault with the NX2A4E2. Note that this bit will also

be set if the is a checksum error with the onboard non-volatile memory.

Bit 13:

Transducer_Fault –

This bit is set to “1” when the channel is in a transducer fault state. If the chan-

nel’s front panel status LED is blinking green, the fault can be cleared by issuing a programming
block with the Reset_Error bit set to “1”. If the status LED is blinking red, then there is an error in
the resolver signals. This can be a wiring issue, or the programmed value for the Resolver Type may
not be correct for the sensor.

Bit 10:

Channel_Type –

Will be set to “0” when the channel is configured as a single-resolver interface chan-

nel. Set to “1” when the channel, and its pair, are programmed as a dual-resolver interface channel.

Bit 09:

VelocityAtZero –

This bit is set to “1” when the velocity reading of the channel is zero. This bit is

reset to “0” if the transducer is rotating or there is a transducer fault.

RESERVED: Bit will equal zero.

Channel 1 Status Word only.
‘0' on all other channels.

MultiChannel Status

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