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Manual EKS Ethernet TCP/IP
Page 34/38 Subject to technical modifications 2547185-01-10/22
8.3.2 Read process
Command message
(message core, PC/control system → EKS, see Figure 7):

TL (device addr.) (start addr. user data) (number of bytes of user data)
Reply message (message core, EKS → PC/control system, see Figure 8 or Figure 9):
For this command there are two possible replies:

RL (device addr.) (start addr. user data) (number of bytes of user data) (user data)
or

RF (device addr.) (00
hex
, 00
hex
) (status number)
The reply message RL (see Figure 8) stands for correct reception of the data.
If an Electronic-Key cannot be read, an RF reply message is received (see Figure 9). The status number then
indicates the cause of the error.
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 07 7
1
2
Command identification
T
L
54
4C
84
76
3 Constant 01 1
4
5 Start address for the user data
00
00 ... 74
0
0 ... 116
6 Number of bytes of user data 01 ... 7C 1 ... 124
Figure 7: Command message Read Electronic-Key read/write (message core)
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 08 ... 83 8 ... 131
1
2
Command identification
R
L
52
4C
82
76
3 Constant 01 1
4
5 Start address for the user data
00
00 ... 74
0
0 ... 116
6 Number of bytes of user data 01 ... 7C 1 ... 124
7 ... 130 User data ASCII or hexadecimal or BCD (code transparent)
Figure 8: Reply message
Read Electronic-Key read/write
(message core)
Byte no. Description
Contents
ASCII hexadecimal decimal
0 Number of message bytes 07 7
1
2
Command identification
R
F
52
46
82
70
3 Constant 01 1
4
5
Padding data
00
00
0
0
6 Status number *
Figure 9: Reply message Read Electronic-Key read/write – status (message core)
* Status number 02
hex
: Electronic-Key not in actuating range
(for further status numbers see chapter 8.5)