
Publication 1794-6.5.11 - November 1997
5-6
How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Word 5
cont.
Bit 11 (13)
Gate Input State (channel 0) – Indicates if there is a valid signal on the gate input. This parameter is only determined once
every 0.5 – 2s.
Bits 12-13
(14-15)
Direction (channel 0) – Indicates the current Direction of Rotation, using both the Frequency and Gate inputs. (Frequency
leads Gate = Clockwise, Gate leads Frequency = CounterClockwise). Used for slow speed detection from 1 – 1,500Hz. “No”
or “Stopped” rotation can be determined by the state of the Missing Pulse Alarm, when it is switched on. A missing
Frequency Input will generate a Missing Pulse Alarm, a missing Gate Input will only generate a “No Sensor Present /
Detected” status (3).
Bits 14-15
(16-17)
Not used
Word 6
Bits 00-03
Diagnostic Status – indicate the response from the module; a normal or non-normal operating condition.
Bit
03
02
01
00
0
0
0
0
0 = Normal Operation (No Failure)
0
0
0
1
1 = Calibration Failure
0
0
1
0
2 = Configuration Failure
A Minimum Frequency Sample Time value other than 0-9 was selected.
0
0
1
1
3 = Message Failure
0
1
0
0
4 = Lead Break Detection Hardware Failure
0
1
0
1
5 = Major Hardware Failure
0
1
1
0
6 = EEPROM Failure
0
1
1
1
7 = RAM Failure
1
0
0
0
8 = ROM Failure
1
0
0
1
9 = Calculation Failure
The actual Frequency is greater than 32,767 Hz. or 3,276.7 Hz. (overange).
The scaled Frequency is greater than 32,767 Hz. or 3,276.7 Hz. (overange).
The % Full Scale calculation (based on Maximum Frequency) is > 3,276.7%.
1010-1111
10 – 15 = Not Used
Bits 04-15
(04-17)
Reserved
Word 7
Bits 00-15
(00-17
Reserved
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 ...