Write With Error Correction; Read Uid; Measure Noise - Mitsubishi MELSEC-Q EQ-V680D1 User Manual

6. HOW TO COMMUNICATE WITH ID TAGS

6.2.12 Write with error correction

6.2.13 Read UID

6.2.14 Measure noise

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The Write with Error Correction command writes to the ID tag the number of byte sets
specified in the number of processed points specification area (Un\G4, Un\G4004) +
the check code (five bytes) from the address specified in the head address specification
area (Un\G3, Un\G4003).
For details of the error correction function, refer Section 5.6, "ID Tag Memory Error
Correction Function".
(1) Example of use
(a) When executing the Write with Error Correction command in the data storage
order 0000 (upper -> lower), for the four bytes from address 0010
H
Buffer memory
Address
Before
b15
execution
Un\G100 12 34
H
56 78
Un\G101
H
A : No. of read bytes (4 bytes)
B : Memory check code (2 bytes)
C : Error correction code (3 bytes)
The Read UID command reads the UID (unit identification number) (8bytes) of the ID
tag, and stores the value in the ID tag UID storage area (Un\G90 to Un\G93,
Un\G4090 to Un\G4093).
The Measure Noise function measures the noise environment surrounding the antenna,
and stores the average value, maximum value, and minimum value of the measured
data in the data storage area (Un\G100 to Un\G102, Un\G4100 to Un\G4102).
Buffer memory
Address
Antenna 1 Antenna 2 Measured data
Average value
Un\G100，Un\G4100
Maximum value
Un\G101，Un\G4101
Minimum value
Un\G102，Un\G4102
b0 b7
0010
0011
0012
0013
0014
0015
0016
0017
0018
"C0" + "00" to "99" [BCD]
"C0" + "00" to "99" [BCD]
"C0" + "00" to "99" [BCD]
ID tag
After
execution
12
H
H
34
H
H
A
56
H H
78
H
H
F0
H
H
B
67
H
H
00
H H
C
0C
H
H
0F
H
H
.
H
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