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Appendix
A.3 Command and acknowledgement frames
SIMATIC RF650R/RF680R/RF685R
330
Configuration Manual, 03/2018, C79000-G8976-C386-06
A.3.4
PHYSICAL-READ
Reads data from a transponder by specifying the physical start address, the memory bank
(UHF) and length.
Table A- 8
Command
Byte
0, 1
2, 3
4
5
6, 7
8
9
10
11
Mean-
ing
DBL
SN
CC
CI
TDB
DBN_H
DBN_L
DBL
--
Value
78
--
'p'
'U'
1
0
1
--
0
Byte
12
13
14, 15
16, 17
18 ... 21
22, 23
24, 25
26
27 ... 88
Mean-
ing
SOURCE BANK
ADRESS LENGTH PSWD
--
--
IDLENGT
H
EPC-ID
Value
0
xx
xx
xx
xx
0
0
xx
xx
Table A- 9
Reply
Byte
0, 1
2, 3
4
5
6, 7
8
9
10
11 ... 239
Mean-
ing
DBL
SN
CC
STATUS TDB
DBN_H
DBN_L
DBL
DATA
Value
--
--
'p'
xx
--
--
--
--
--
Table A- 10 Description of the bytes
Byte
Description
Command
12
Reserved (value = 0)
13
Memory bank on the transponder:
•
0x00 = RESERVED
•
0x01 = EPC
•
0x02 = TID
•
0x03 = USER
14, 15
Physical start address on the transponder:
•
0 ... 0xFFFF
16, 17
Number of bytes to be read
18 ... 21
Password for transponder access:
•
0x00 = no password
26
Length of the EPC ID:
•
0x00 = not addressed
27 ... 88
Buffer for up to 62 bytes EPC-ID
Response
11 ... 239
Data that exceeds 239 bytes is transferred in several blocks.