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Chapter 6, 6 - monitoring status data, Input image table – Rockwell Automation 1746-BTM Barrel Temperature Control Module User Manual User Manual

Page 59: Implied decimal point, Input image table -1, Implied decimal point -1, Monitoring status data, Chapter

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Publication 1746-UM010B-EN-P - April 2001

Chapter

6

Monitoring Status Data

This chapter describes status data reported by the BTM module in the
input image table (16 words), applicable to the sample program.

Input Image Table

Implied Decimal Point

You must interpret the value of displayed 16–bit integer numbers. For
temperature values reported in words 0-3, the implied decimal point is
1 place from the right (for a resolution to be 0.1). For example, if
4999 is displayed, you must interpret it as 499.9.

Table 6.A Status Values from Each Loop

1

2

3

4

Bit

Define

M1

Indicated By

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

0

1

2

3

Current temperature (-3276.8° thru +3276.°7)

4

5

6

7

0

Open circuit

0 = None; 1 =Error

1

Under range

0 = None; 1 =Error

2

Over range

0 = None; 1 =Error

3

Configuration

0 = None; 1 =Valid

4

Parameter value

0 = None; 1 = Error

5

PV rate alarm

10

0 = None; 1 = Alarm

6

Thermal Integrity

16

0 = None; 1 = Alarm

7

High CV limit

2

0 = None; 1 = Alarm

8

Low CV limit

3

0 = None; 1 = Alarm

9

Low temperature

11

0 = None; 1 = Alarm

10

High temperature

12

0 = None; 1 = Alarm

11

Low deviation

13

0 = None; 1 = Alarm

12

High deviation

14

0 = None; 1 = Alarm

>15

Reserved

8

9

10

11

0

Loop control

0 = No; 1 = Enabled

1

Loop mode

0 = Manual; 1 = Auto

2

Setpoint

5

0 = Standby; 1 = Run

3

Autotune
complete

0 = No; 1 = Yes

4

Autotune success

0 = No; 1 = Yes

5

Setpoint ramping

0 = No; 1 = Enabled

6

Heat TPO

0 = Off; 1 = On

7

Cool TPO

0 = Off; 1 = On

8-15

See Table 6.C on page 6-2

0 = None; 1 = Alarm

12

13

14

15

Function and value of this word set by N10:192, bits 8-10. See Table 6.B