Omron CRT1 - 10-2008 Operation Manual page 349

Overview of Temperature Input Units
Top/Valley Detection
Timing Flags
Temperature Status Flags
326
The following tables show the data format used for allocating data in the Mas-
ter Unit.
Data is allocated as two's complements.
Normal Display (4 Words (8 Bytes))
15
1/100 Display Mode (8 Words (16 Bytes))
15
Temperature Data 1 for Input 0, Lower Word
Temperature Data 1 for Input 0, Upper Word
Temperature Data 1 for Input 1, Lower Word
Temperature Data 1 for Input 1, Upper Word
Temperature Data 1 for Input 2, Lower Word
Temperature Data 1 for Input 2, Upper Word
Temperature Data 1 for Input 3, Lower Word
Temperature Data 1 for Input 3, Upper Word
These flags turn ON for the one-shot time when a top or valley is detected for
the top/valley hold function. These flags are allocated when detecting the time
to read the values held as the top or valley values at the Master Unit. The fol-
lowing data format is used when these flags are allocated in the Master Unit
(1 word (2 bytes)).
Bit 7
+0 0
+1 0
Each bit is described in the following table.
Byte Abbreviation
+0 V_STx
+1 T_STx
Note The one-shot time can be changed. For details, refer to 11-5 Temperature
Input Unit Functions.
The Temperature Status Flags include the Comparator Result Flag, the Top/
Valley Detection Timing Flags, and the Disconnected Line Detection Flags.
These flags are allocated for detection and monitoring. The data format used
for each byte when these flags are allocated in the Master Unit is shown
below (2 words (4 bytes)).
Temperature Data 1 for Input 0
Temperature Data 1 for Input 1
Temperature Data 1 for Input 2
Temperature Data 1 for Input 3
Bit 6 Bit 5 Bit 4
0 0 0
0 0 0
Name
Valley Detection
Timing Flag
Top Detection
Timing Flag
Section 7-2
0
0
Bit 3 Bit 2 Bit 1
V_ST3 V_ST2 V_ST1
T_ST3 T_ST2 T_ST1
Description
Turns ON when a valley is
detected by the top/valley hold
function and then turns OFF after
the one-shot time has elapsed.
Turns ON when a top is detected
by the top/valley hold function and
then turns OFF after the one-shot
time has elapsed.
Bit 0
V_ST0
T_ST0