Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual User Manual
Page 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)
0
0
0
0
2
0
0
0
1
4
0
0
1
0
5
0
0
1
1
10
0
1
0
0
20
0
1
0
1
50
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