BTW Word 0, Point-on-Priority
Bits 00–11 set the priority status of corresponding points 1–10.
bit
11
10
07
06
05
04
03
02
01
00
point
10
9
8
7
6
5
4
3
2
1
bit status 0 = normal
1 = priority
e.g.
bit
11
10
07
06
05
04
03
02
01
00
status
0
0
0
0
0
0
0
1
0
1
points 3 and 1 are on priority scan
All other bits are reserved and should contain 0.
This word is ignored if the Milltronics device is configured as a full rack (P754 Rack Size
set to 4). In that case, use discrete output word 7 to control point-on-priority.
If this word is used to control point-on-priority, then the Milltronics device must be
configured to permit this. Parameter P720 must be set to 1 (manual, BIC-II or
SmartLinx) for each point to permit priority control for that point. To enable priority
control for all points, simply store ‘1’ to parameter P720, point ‘0.’
BTW Word 1: Parameter Number, MPA
Specifies the parameter number for the returned value in BTR words 21–30.
BTW Word 2: Parameter Index, MPA
Specifies the parameter index for the parameter returned in BTR words 21–30. This
word is ignored for parameters which don’t use indices.
Some specific Milltronics device parameters use indices to address the multiple values
stored within the single parameter.
For example, parameters P054 level breakpoints and P055 breakpoint volumes use the
index to specify which breakpoint to read. High-level-language programmers might think
of this index as an array index.
BTW Word 3: Decimal Place, MPA
Specifies the number of decimal places in each of the returned values in BTR words 21–30.
For example, a 1 would mean all returned values would have 1 decimal place, i.e. a
returned value of 5,213 should be interpreted as 521.3. This value may be negative,
indicating trailing zeros; for example if this word were -1, a returned value of 5,213
should be interpreted as 52,130.
BTW Word 4: Format, MPA
Sets the format for the returned values in BTR words 21 – 30.
0 = normal
1 = percent of span
PL-533
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Milltronics SmartLink 3/31/97 1:16 PM Page 12
