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OCR Type A230
PLC data monitor
Register
Value
Description
No.
(Hex.)
Bit 15
1
00E1
0
0
2
04D2
The value 1234 is stored.
3
The value −12 is stored.
FFF4
4
0000
The value 0 is stored.
5
0038
The value 56 is stored.
Concept:
Four Judgment data are stored per word. The data of JD02 is not set, but "E" is output
because the data before and after JD02 are set.
In the case where the data of CA01, CA02, or CA04 is out of the range between −32768
and +32767, "0" is stored in the registers 2 to 5.
When "Data Type" is set to "32−bit", four Judgment data are stored per word as
described above. But the data of Numeric Calculation is stored in two words (in this
case, lower bytes are stored in the registers with smaller numbers).
Timing chart for when an overflow occurs
If a numerical calculation overflows (exceeds 32 bits, or exceeds 16 bits in 16−bit
mode), the OVF signal is output and the data block required for the numerical
calculation is output as zeros.
* For the case that the selection is set to "OFF After Read"
/START
OFF
ON
/READY
ON
T2
/D1 to D8
OFF
/OVF
OFF
T1: START signal width (1ms min.)
T2: Response time with respect to the START signal (within 1ms.)
0
0
0
0
0
0
T1
OFF
Judgment
Numerical calculation (overflow)
ON
Communications (Serial and Parallel)
Bit 0
1
1
1
0
0
0
0
T1
T2
16.11 Computer Link
Data
1
Judgment
JD04−JD01
CA01
CA02
Numeric
Numeric
Calculation
CA03 (Not set)
CA04
16 − 63
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