This example of an Analog Input Tag read from a Modbus PLC. The Tag name is ZT-184. Significant features are that it has alarming enabled, including deviation alarming when the temperature deviates form setpoint (SP-184), plus High-High, High, Low and Low-Low temperature alarms. It sis read only because it is an Input from the field. It has Keep Previous Value in the event of communication failure; the operator can see the last good value.
|
Tag Type |
Point (analog) |
|
Tag Name |
ZT-184 |
|
Description |
Zone Temp Rm 184 |
|
Scan Type |
Constant Scan |
|
Address |
40184 |
|
Conversion Code |
Unsigned Integer |
|
Start Bit |
0 |
|
Length |
16 |
|
Signal Reverse |
Yes |
|
Scaling Type |
No Scale |
|
Scaling Factor 1 |
0 |
|
Scaling Factor 2 |
0 |
|
Log Data |
Yes |
|
Data Log DB |
1 |
|
Write Change Log |
Yes |
|
Read Only |
Yes |
|
Keep Previous Value |
Yes |
|
Value |
0 |
|
Security Area |
0 |
|
Security Level |
0 |
|
Span High |
130 |
|
Span Low |
0 |
|
Output High Limit |
130 |
|
Output Low Limit |
0 |
|
Engineering Unit |
DegF |
|
Display Digits (Integer) |
3 |
|
Display Digits (Fraction) |
1 |
|
Array Size |
0 |
|
Alarm Data |
|
|
HH Priority |
3 |
|
HH Alarm Limit |
85 |
|
High Priority |
2 |
|
High Alarm Limit |
78 |
|
Low Priority |
2 |
|
Low Alarm |
50 |
|
LL Priority |
3 |
|
LL Alarm |
45 |
|
HL Db |
2 |
|
HL Db Percentage |
No |
|
Roc Priority |
0 |
|
Rate Of Change |
0 |
|
Dev. Tag Name |
SP-184 |
|
Dev. Hi Priority |
1 |
|
Dev. Hi Limit |
3 |
|
Dev. Lo Priority |
1 |
|
Dev. Lo Limit |
3 |
|
Dev. Percentage |
No |
|
Dev. DB |
1.5 |
|
Alarm Graph |
BLDG7 .bgr |