Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual - Manual (Page 161)

Block Transfer Write and Block Transfer Read Configurations for 6 Output/2 Input 1771-N Series Modules I–9
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
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 data format was chosen and
output value was not a legal BCD value.
Word 4
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 10-14
(12-16)
Not used. Always 0.
Bit 15 (17)
I/O select bit.
0 = output,
1 = input.
This bit is set to 0.
Word 5
Bits 00-15
(00-17)
Channel 1 Raw data sent to DAC.
Words 6 and 7 Same as words 4 and 5, but for channel 2
Words 8 and 9 Same as words 4 and 5, but for channel 3
Words 10 and 11 Same as words 4 and 5, but for channel 4
Words 12 and 13 Same as words 4 and 5, but for channel 5
Words 14 and 15 Same as words 4 and 5, but for channel 6
Bit 00
Underrange bit. This bit is set if the input signal is below the
input channels minimum range.
Word 16
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
signal is lower than the low alarm setpoint.