Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manual de usuario descargar pdf (Pagina 56)

Publication 1794-6.5.11 - September 2011

46 Read and Write Configuration Maps for the FLEX I/O Module

Word 6 Bits 00…01 Wire-Off/Missing Pulse fault select (channel 1) – Sets the mode for 24V DC IEC 1+ Wire

Off Input Detection and Missing Pulse Detection result for any input (Frequency or Gate).

The Maximum Frequency is determined by Frequency Range bit and the Maximum

Frequency value, and the Minimum Frequency is determined by Frequency Range bit.

The Wire Off detect time (in mode 1, 2, and 3) is 2 seconds maximum.

Bit 01 00 Channel wire-off or missing pulse fault mode

0 0 Disabled

0 1 Alarm only (frequency unchanged)

1 0 Alarm and force frequency to maximum frequency value (32767 or

3276.7 or maximum frequency value, 0).

1 1 Alarm and force frequency to minimum frequency value (0 or 0.0).

Bits 02…03 Missing pulse delay multiplier bits (channel 1) – Specifies the number of Missing Pulse

Alarms periods (Minimum Frequency Sampling Times) which will be tolerated before the

alarm is actually generated, if enabled. (Used to defeat the Missing Pulse Alarm during

a system startup.)

Default = 0 – No multiplier; alarm generated immediately (normal mode with 2 s

extension delay)

Bit 03 02 Alarm periods before alarm generated

0 0 No multiplier; alarm generated immediately (normal mode with 2 s

extension delay)

0 1 2 sample periods + 2 s delay before alarm

1 0 8 sample periods + 2 s delay before alarm

1 1 32 sample periods + 2 s delay before alarm

Bit 04 Frequency or Acceleration Alarm Select (channel 1) – Determines if the value in the

Maximum Frequency or Acceleration write word is a Frequency (actual or scaled) or

Acceleration Alarm value. If set to Frequency, Acceleration is not calculated.

0 = Frequency alarm

1 = Acceleration alarm

Default = 0 – frequency alarm

Bits 05…06 Acceleration Calculation Time (channel 1) – Specifies the number of Frequency Sample

Times over which the module calculates acceleration.

Default = 0 – Rolling Average (previous 4 samples)

Bit 06 05 Acceleration Calculation Time in Frequency Sample Times

0 0 Rolling Average (previous 4 samples)

018

1016

1132

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 86 87

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Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manual de usuario Pagina 56