Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual - Manual (Page 170)

Block Transfer Write and Block Transfer Read Configurations for 5 Output/3 Input 1771-N Series Modules J–8
Publication 1771ĆUM127B-EN-P - December 2002
Definition
Decimal Bit
(Octal Bit)
Word
Bit 00-03 Not used. Always 0
Bit 04
Low clamp. This bit is set if alarms are enabled and the output data is lower
than the low clamp value.
Bit 05
High clamp. This bit is set if alarms are enabled and the output data is higher
than the high clamp value.
Word 4
Bit 06
Rate alarm. This bit is set if alarms are enabled and the output data changed
faster than the programmed ramp rate.
Word 4
Bit 07
Bad data. This bit is set if BCD format was chosen and the output data is not
a legal BCD value.
Bits 08 (10)
Bad programming. This bit is set if the most recent BTW contained improper
programming data for this channel
Bit 09 (11) Bad calibration. This bit is set if the channel has not had a valid calibration.
Bits 10-15
(12-17)
Not used. Always = 0
Word 5 Bits 00-15
(00-17)
Channel 1 Raw data sent to DAC.
Word 6 and 7 Same as words 4 and 5 but for channel 2.
Word 8 and 9 Same as words 4 and 5 but for channel 3.
Word 10 and 11 Same as words 4 and 5 but for channel 4.
Word 12 and 13 Same as words 4 and 5 but for channel 5.
Bit 00
Underrange bit. This bit is set if the input signal is below the input channels
minimum range.
Bit 01
Overrange bit. This bit is set if the input signal is above the input channels
maximum range.
Bits 02-03 Not used. Always 0
Bit 04
Low alarm. This bit is set if alarms are enabled and the input data is lower
than the low alarm setpoint.
Bit 05
High alarm. This bit is set if alarms are enabled and the input data is higher
than the high alarm setpoint.
Word 14
Bit 06
Rate alarm. This bit is set if the input signal changed at a rate faster than the
input rate alarm setpoint.
Bit 07 Not used. Always 0
Bit 08 (10)
Bad program. This bit is set if any of the channel level programming data is
illegal.
Bit 09 (11) Bad calibration. This bit is set if the channel has not had a valid calibration.
Bits 10-14
(12-16)
Not used. Always 0
Bit 15 (17) Not used. Always = 1