Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manual de usuario descargar pdf (Pagina 57)

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 47

Word 6 Bit 07 Initiate Startup Select (channel 1) – Alerts a channel that if process startup is in

progress to defeat the missing pulse alarm for a time determined by the missing pulse

delay multiplier.

0 = Normal run mode,

1 = Startup Mode – Defeat/delay Missing Pulse Alarm

Default = 0 – Normal run mode

Bits 08…11

(10…13)

Minimum Frequency Sampling Time (channel 1) – Specifies the minimum time (in ms)

the module will spend collecting pulses to determine the Frequency.

Bit 11 10 09 08 Minimum Frequency Sampling Time (in ms)

00002

00014

00105

001110

010020

010150

0 1 1 0 100

0 1 1 1 200

1 0 0 0 500

1 0 0 1 1000

1010…1111 not used – 2 ms default sample time used

Bit 12 (14) Invert Select – Frequency Input (channel 1) – Selects whether to invert the Frequency

input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or Normally

Open relay or switch contact on the 24V DC Frequency Input terminal. Allows

compatibility with an Active Low (0V = On) 24V DC IEC 1+ sensor or Normally Closed

relay contact on the 24V DC Frequency Input terminal.

0 = Normal (Active High, 24V = On),

1 = Invert input (Active Low, 0V = On).

Default = 0 – Normal (Active High, 24V = On)

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 86 87

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Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manual de usuario Pagina 57