Output Words 1–6: Point and Parameter Numbers, Words 1–6
The words determine what will be returned in discrete input words 1–6. These words
contain both the parameter and the point to be read, as determined by the following
formula:
Word 1–6 = (point x 1,000) + parameter
For example, if it was desired to read the level of transducer 6 back in discrete input
word 1, where level is returned in parameter 920, the value 6,920 decimal would be
written to discrete output word 1.
In this manner, up to 6 values may be read in a full rack, or just 1 value in a quarter
rack. The choice must be made as to how many values must be read simultaneously
(i.e. data transfer bandwidth), and how much rack space may be occupied.
Any combination is possible; for example, with a full rack 6 levels from 6 points can be
read simultaneously, 3 parameters each from 2 points, 6 parameters from 1 transducer,
or any other desired combination of the 6 words available in the full rack configuration.
Output Word 7: Point Status
bits
description
(octal)
00–11:
point i.d.
Each bit confirms the association of the point(s) identified, to the request for
the point status, bits 12–17.
bit
11
10
07
06
05
04
03
02
01
00
point
10
9
8
7
6
5
4
3
2
1
e.g. bits
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 identified.
12–17:
point status command
Indicates the status of the points identified by bits 00–11:
bits
17
16
15
14
13
12
0
0
0
0
0
0
= point in alarm
0
0
0
0
0
1
= point-on-priority
For example, to put points 1 and 3 on priority scan, store the binary value
0000010000000101 to discrete output word 7; the actual point-on-priority status is
returned in discrete input word 7. For another example, store the value 0 to this word,
and the point alarm status is returned in discrete input word 7.
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.’
PL-533
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Milltronics SmartLink 3/31/97 1:16 PM Page 20
