Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual - Manual (Page 157)

Block Transfer Write and Block Transfer Read Configurations for 6 Output/2 Input 1771-N Series Modules I–5
Publication 1771ĆUM127B-EN-P - December 2002
Definition
Decimal Bit
(Octal Bit)
Word
Words 15 thru 20 Same as words 9 thru 14 but for channel 2.
Words 21 thru 26 Same as words 9 thru 14 but for channel 3.
Words 27 thru 32 Same as words 9 thru 14 but for channel 4.
Words 33 thru 38 Same as words 9 thru 14 but for channel 5.
Words 39 thru 44 Same as words 9 thru 14 but for channel 6.
Word 45
Bits 00-15
(00-17)
Low scale value for channel 7.
Word 46
Bits 00-15
(00-17)
High scale value for channel 7.
Word 47
Bits 00-15
(00-17)
Low alarm value for channel 7.
Word 48
Bits 00-15
(00-17)
High alarm value for channel 7.
Word 49
Bits 00-14
(00-16)
Rate alarm. If the channel's input changes at a rate faster than
this value and the alarm enable bit is set, the channel will
indicate a rate alarm condition. Legal values are from 0.05 to
50% of full scale per second.
Bit 15 (17)
Alarm enable bit. If set to 1, the module will report high alarm,
low alarm, underrange, overrange, and rate alarm conditions. If
0, these warnings are suppressed.
Word 50 Bits 00-07
Alarm deadband. 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.
Bits 08-15
(10-17)
Filter time constant. Specifies the time constant of a digital, first
order lagfilter on the input in 0.1 second units. Legal values
are 0.1 to 9.9 seconds. A value of 0 disables the filter.