
Publication 1794-6.5.11 - November 1997
4-8
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Word 1
Bits 00-15
(00-17)
Maximum frequency or absolute value acceleration/deceleration (channel 0) – Specifies the highest Frequency or
absolute Acceleration/Deceleration value allowed on the Frequency input. 0-32,767, 0.0-3,276.7Hz.
–OR–
0-32,767Hz/s
depending on the Frequency Range and Frequency/Acceleration Alarm Select bits.
Word 2
Bits 00-07
Frequency scaling multiplier (channel 0) – Specifies a multiplier to scale the incoming Frequency value. 0-255.
Default = 0 – no scaling multiplication performed (x1)
Bits 08-15
(10-17)
Frequency scaling divisor (channel 0) – Specifies divisor to scale the incoming Frequency value. 0-255.
Default = 0 – no scaling division performed (divided by 1)
Word 3
Bits 00-01
Wire-Off/Missing Pulse fault select mode (channel 0) –
Sets the mode for 24 Vdc 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, & 3) is 2 seconds maximum.
Bit
01
00
Channel wire-off/missing pulse detection 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 0)– 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 2s extension delay)
Bit
03
02
Alarm periods before alarm generated
0
0
No multiplier; alarm generated immediately (normal mode with 2s extension delay)
0
1
2 sample p 2s delay before alarm
1
0
8 sample p 2s delay before alarm
1
1
32 sample p 2s delay before alarm
Bit 04
Frequency or Acceleration Alarm Select (channel 0)– 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
Word
Bit
Definition
Содержание FLEX I/O 1794-IJ2
Страница 1: ...User Manual FLEX I O Frequency Input Module Cat No 1794 IJ2 Allen Bradley Allen Bradley Replacements ...
Страница 6: ...Publication 1794 6 5 11 November 1997 4 Using This Manual ...
Страница 19: ...Publication 1794 6 5 11 November 1997 1 10 Overview of the Frequency Input Module Allen Bradley Replacements ...
Страница 38: ...Publication 1794 6 5 11 November 1997 3 6 Programming Your Frequency Input Module ...
Страница 67: ...Publication 1794 6 5 11 November 1997 6 4 Troubleshoot the Frequency Input Module Allen Bradley Replacements ...