Block Transfer Read
Values returned in the words in the block transfer read are in response to the block
transfer write to the Milltronics device.
Words 0 through 20 have values with fixed meanings and formats.
Words 21 through 34 have values returned in response to BTW words 1 through 4, for
Multiple Parameter Access (MPA).
Words 35 through 41 are values returned in response to BTW words 5 through 12 for
Single Parameter Access (SPA).
words
description
0
point status
1–10
point reading
11–20
point alarm and status
21–30
returned values, MPA
31
decimal place, MPA
32
format, MPA
33
parameter number, MPA
34
parameter index, MPA
35
parameter, SPA
36
transducer, SPA
37
index, SPA
38
value, SPA
39
decimal place, SPA
40
format, SPA
41
read/write flag, SPA
BTR Word 0:
bit
description
(octal)
00–11:
point status
indicate the operation of the 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
If a bit status is 1, the corresponding point is deemed to be operational,
based on the criteria defined by BTR words 11–20, bits 00–03. If the bit
status is 0, then the corresponding point is deemed non-operational. To
further diagnose a point’s operation, examine the corresponding word 11
through 20.
If a bit status is 1, then for the corresponding point alarm word 11–20, one or
more of the alarm bits 00–03 must be 1 to indicate the operational problem.
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Milltronics SmartLink 3/31/97 1:16 PM Page 15
