319
Temperature Input Units
Section 7-1
7-1-3
Temperature Input Unit Display Modes
Temperature Input Units have two Display Modes: normal and 1/100 display.
Normal Display Mode
(Default Setting)
The input temperature data is converted to 4-digit hexadecimal digital data
and transmitted to the Master Unit. If the conversion data is negative, the neg-
ative value is expressed as the two's complement.
Four words are allocated in the Master Unit for the four inputs, as shown in the
following diagram. If the data for the input type contains a digit below the dec-
imal place, the value sent to the master will be 10 times the actual value. (The
decimal point is omitted.)
• Example 1: R type thermocouple at 1,000
°
C
1,000 converted to hexadecimal
→
03E8 hex
• Example 2: U type thermocouple at 350.0
°
C
350
×
10 = 3,500 converted to hexadecimal
→
0DAC hex
1/100 Display Mode
The input temperature data for all input types is transmitted to the Master as
data with precision to 0.01 digits. The temperature data is multiplied by 100
and converted to 8-digit hexadecimal digital data (four long values).
If the conversion data is negative, the negative value is expressed as the two’s
complement.
Eight words are allocated in the Master Unit for the four inputs, as shown in
the following diagram.
3
0
2
1
4
6
5
7
8
10
9
11
12
14 13
15
First word + 0
Input 0 Temperature conversion data
First word + 1
Input 1 Temperature conversion data
First word + 2
Input 2 Temperature conversion data
First word + 3
Input 3 Temperature conversion data
3
0
2
1
4
6
5
7
8
10
9
11
12
14 13
15
First word + 0
Input 0 Temperature conversion data (rightmost)
First word + 1
Input 0Temperature conversion data (leftmost)
First word + 2
Input 1 Temperature conversion data (rightmost)
First word + 3
Input 1 Temperature conversion data (leftmost)
First word + 4
Input 2 Temperature conversion data (rightmost)
First word + 5
Input 2 Temperature conversion data (leftmost)
First word + 6
Input 3 Temperature conversion data (rightmost)
First word + 7
Input 3 Temperature conversion data (leftmost)
Содержание CRT1 - 10-2008
Страница 2: ...CRT1 Series CompoNet Slave Units and Repeater Unit Operation Manual Revised October 2008...
Страница 3: ...iv...
Страница 5: ...vi...
Страница 9: ...x...
Страница 15: ...xvi...
Страница 23: ...xxiv Conformance to EC Directives 6...
Страница 51: ...28 Slave Unit Models Section 1 2...
Страница 123: ...100 Connecting External I O for Slave Units Section 3 6...
Страница 365: ...342 Temperature Input Units Section 7 5...
Страница 381: ...358 Expansion Unit Specifications Section 8 2...
Страница 418: ...395 Repeater Unit Section 10 2 Dimensions 42 3 50 3 1 27 5 95 mm...
Страница 419: ...396 Repeater Unit Section 10 2...
Страница 424: ...401 CX Integrator Section 11 1...
Страница 575: ...552 Current Consumption Summary Appendix D 552...
Страница 581: ...558 Index...
Страница 583: ...560 Revision History...