Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual - Manual (Page 136)

Block Transfer Write and Block Transfer Read Configurations for 3 Output/5 Input 1771-N Series Modules G–4
Publication 1771ĆUM127B-EN-P - December 2002
Definition
Decimal Bit
(Octal Bit)
Word
Word 5
Bits 00-15
(00-17)
Real time sample. Sample time in milliseconds. 0 = off.
RTS minimum is 100msec (counts = 100). Maximum 10 seconds in binary; 9.999
seconds in BCD.
Word 6
Bits 00-15
(00-17)
Low scale value for channel 1. Scale values are limited to +32767 in binary format;
+7999 in BCD format.
Word 7
Bits 00-15
(00-17)
High scale value for channel 1. Scale values are limited to +32767 in binary format;
+7999 in BCD format.
Word 8
Bits 00-15
(00-17)
Low clamp value for channel 1. The channel output will not be allowed to go below
this value (in scaled units) regardless of the data sent to the module. Clamp values
are limited to +32767 in binary format; +7999 in BCD format.
Word 9
Bits 00-15
(00-17)
High clamp value for channel 1. The channel output will not be allowed to go above
this value (in scaled units) regardless of the data sent to the module. Clamp values
are limited to +32767 in binary format; +7999 in BCD format.
Word 10
Bits 00-11
(00-13)
Maximum ramp rate. If this field is not 0, the module will limit the maximum rate of
change for this channel to be a percentage of the scaled range of the module. Legal
values are from 1 to 200% of full scale/second.
Bit 12 (14) Constant = 0
Bits 13-14
(15-16)
Reset state. This field controls what the channel will output if the I/O reset line is
asserted:
00 binary = last state;
01 binary = minimum output; (example: < -10V, < 4mA)
10 binary = maximum output; (example: > 10V, > 22mA)
11 binary = user reset value.
Bit 15 (17)
Alarm enable. If set to 1, the module reports high clamp, low clamp and rate limit. If
0, these warnings are suppressed.
Word 11
Bits 00-15
(00-17)
Reset value. If the user selects the channel to go to a user reset value upon I/O
reset, the value in scaled units is entered here. Otherwise, set to 0.
Word 12 thru 17 Same as words 6 thru 11 but for channel 2.
Word 18 thru 23 Same as words 6 thru 11 but for channel 3.
Word 24
Bits 00-15
(00-17)
Low scale value for channel 4.
Word 25
Bits 00-15
(00-17)
High scale value for channel 4.
Word 26
Bits 00-15
(00-17)
Low alarm value for channel 4.
Word 27
Bits 00-15
(00-17)
High alarm value for channel 4.
Word 28
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 29 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.