Through, Btr word descriptions – Rockwell Automation 1771-CFM,D17716.5.99 CONFIGURABLE FLOWMET User Manual
Page 53
5–3
Interpret Module Status and Input Data
Publication 1771Ć6.5.99 - December 1995
BTR Word Descriptions
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
PowerĆup Bit indicates if
a valid BTW has occurred
since powerĆup or since
last switched from
Program to Run mode.
Header must be 0010.
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Error Words & Diagnostics displays
invalid BTW word # (0Ć60 BCD).
99 = invalid BTW length.
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Mode Indication for Channel 2
Mode Indication for Channel 0
Mode Indication for Channel 3
Mode Indication for Channel 1
Output Status reflects current
operating state of outputs.
b12 = Output 0 b13 = Output 1
b14 = Output 2 b15 = Output 3
VALUES:
0 = OFF
1 = ON
ЙЙЙЙЙЙ
ЙЙЙЙЙЙ
word 3
word 2
word 1
ЙЙЙЙЙЙЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙЙЙЙЙЙЙ
0
0
1
0
0 = unused channel
1 = Totalizer
3 = HighĆresolution Frequency (channels 0 & 1 or 2 & 3)
2 = Nonresettable Totalizer
4 = Direction Sensor (channels 0 & 1 or 2 & 3)
Indicates mode of operation that
channel is currently running in.
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Channel 0
Channel 1
Prover Status indicates the current state of prover (value of bits in hex).
0 = prover not selected
4 = prover is returning on reverse leg (bidirectional only)
1 = prover not running, but active
5 = prover is done with run (BTR word 13/14 contains prover count value)
2 = prover running Ć past the 1st switch in forward leg
6 = prover not active & new store count A
3 = prover is done with forward leg and returning at this time
7 = prover not active & new store count B
Ć intermediate value returned (bidirectional only)
Overrange
Alarm
Overflow
Status
Prover
Status
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Channel 2
Channel 3
Overrange Alarm
on if the frequency is > than
100kHz (frequencies > 100kHz
may not be accurately returned).
Acceleration Alarm
on if |acceleration value| is >
Acceleration Alarm Value
(BTW word 9, 19, 29, 39).
Overspeed Alarm
on if frequency is >
Highest Allowable Frequency
(BTW word 8, 18, 28, 38).
Overflow Status
toggles between 0Ć1Ć0Ć1 every time a
rollover occurs. This bit is reset by
BTW word 1 (bits 04Ć07).
Acceleration
Alarm
Overspeed
Alarm
Overrange
Alarm
Overflow
Status
Prover
Status
Acceleration
Alarm
Overspeed
Alarm
word 4
word 5
all
all
all
T, NRT
T, NRT
if prover not active,
these bits toggle 6Ć7Ć6Ć7 every
high transition of the gate
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
VALUES: 1= no or invalid BTW
0 = yes