Avtron ADDvantage-32, Manual

Page: 287 / 290

ADDvantage-32
Advanced Control Module (ACM)
9-17
• The Analog Setpoint Data Starting Address refers directly to the analog data
table address where the Analog Setpoint values will be consecutively written.
The Analog Setpoint Data Starting Address is interpreted as a 32-bit integer,
with Word 1 being the least significant, Word 2 as most significant. For
example, placing a value of 42 in Word 1 a value of 0 in Word 2, the analog
data table address will be identified as A042:. Typical applications use
A###:LOCATION 1 through A###:LOCATION 8 for this purpose. The
analog setpoints must be of 32-bit IEEE 485 format, little endian, and occupy
two consecutive 16-bit integer registers at the locations given in
Table 9.3.47-1. The number of Analog Setpoint values written is scalable
using the Number of Analog Setpoints parameter. The Number of Analog
Setpoints is interpreted as a 32-bit integer, with Word 1 being the least
significant, Word 2 as most significant. This value can be up to 8 floating
point values and will determine the overall size of the message. As an
example, if only two analog values are intended to be sent as part of the
AutoScan Write message, the Number of Analog Setpoints parameter shall be
set to two (2) and the total message length transferred to the ADDvantage32
should therefore be 12 integer words in length.
• The Digital Setpoint Data Starting Address refers to the digital data table
address where the Digital Setpoint bits will be consecutively written. The
Digital Setpoint Data Starting Address is interpreted as a 32-bit integer, with
Word 1 being the least significant, Word 2 as most significant. For example,
placing a value of 96 in Word 1 a value of 0 in Word 2, the digital data table
address will be identified as D096:. Typical applications use D###:LOC BIT
1 through D###:LOC BIT 16 for this purpose. The number of digital
setpoints is fixed at 16 and occupy integer word #4 within the AutoScan Write
message.