Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual User Manual
Page 58
Publication 1794-6.5.11 - September 2011
48 Read and Write Configuration Maps for the FLEX I/O Module
Word 6
Bit 13 (15)
Invert Select – Gate Input (channel 1) – Selects whether to invert the Gate 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 Gate Input terminal. Allows compatibility with an Active
Low (0V = On) 24 V DC IEC 1+ sensor or “Normally Closed” relay contact on the 24V DC
Gate Input terminal.
0 = Normal (Active High, 24V = On),
1 = Invert input (Active Low, 0V = On)
Default = 0 – Normal (Active High, 24V = On)
Bit 14 (16)
Wire Off Fault Select – Frequency Input (channel 1) – Selects whether to turn On or Off
the 24V DC Frequency input IEC 1+ hardware Wire Off (Lead Breakage) detection.
0 = Disable,
1 = Enable
Default: = 0 – Disable
Note: Customer devices must draw more than 0.4 mA in the On and Off State. To use
this feature with relays or switches, connect a shunt resistor (~ 50K) across the
contacts.
Bit 15 (17)
Wire Off Fault Select – Gate Input (channel 1) – Selects whether to power On or Off the
24V DC Gate input IEC 1+ hardware Wire Off (Lead Breakage) detection.
0 = Disable,
1 = Enable
Default = 0 – Disable
Note: Customer devices must draw more than 4 mA in the On and Off State. To use this
feature with relays or switches, connect a shunt resistor (~ 50K) across the contacts.
Input Map
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word
Read
0
Frequency 0…32,767 or 0.0…3,276.7 Channel 0
1
% Full Scale 0.0…3,276.7% Channel 0 or Acceleration -32,768…32,767 Channel 0
2
Frequency 0…32,767 or 0.0…3,276.7 Channel 1
3
% Full Scale 0.0…3,276.7% Channel 1 or Acceleration -32,768…32,767 Channel 1
4
R
R
Direction
Ch 0
GS
Ch 0
F/A
Ch 0
WO
Ch 0
MPA
Ch 0
R
R
Direction
Ch 1
GS
Ch 1
F/A
Ch 1
WO
Ch 1
MPA
Ch 1
5
Reserved
Diagnostic Status
Channel 0
Reserved
Diagnostic Status
Channel 1
6
Reserved
Where:
R = Reserved
GS = Gate state
F/A = Frequency/Acceleration alarm
WO = Wire-off alarm
MPA = Missing pulse alarm
Bit/Word Definitions for the Block Transfer Write Words
Word
Bit
Definition