Rockwell Automation 1791-XXXX ANALOG BLOCK I/O User Manual
Page 46

Analog Block Applications Using
Block Transfers
Chapter 4
4-6
Description
Decimal Bit
(Octal Bit)
Word
Word 25
Bits 00Ć15 (00Ć17)
High alarm level for input channel 3. When the input value for this channel is greater than the
high value, the corresponding high alarm bit is set in the BTR.
Word 26
Bits 00Ć15 (00Ć17)
Alarm deadband for input channel 3. This field creates a hysteresis effect on the low and high
alarms. For an alarm condition to be removed, the input signal must go above the low alarm
limit or below the high alarm limit by an amount equal to the specified deadband. Alarm
deadband values must be less than or equal to one half the difference of the high and low
alarm values.
Table 4.C
Filter Time Selection
Filter Time
Bit Settings
Filter Time
Bit 03 Bit 02 Bit 01 Bit 00
Default Ć no filter
0
0
0
0
Do not use.
0
0
0
1
200ms
0
0
1
0
300ms
0
0
1
1
400ms
0
1
0
0
500ms
0
1
0
1
600ms
0
1
1
0
700ms
0
1
1
1
800ms
1
0
0
0
900ms
1
0
0
1
1000ms
1
0
1
0
1100ms
1
0
1
1
1200ms
1
1
0
0
1300ms
1
1
0
1
1400ms
1
1
1
0
1500ms
1
1
1
1
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