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
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