EUCHNER CIS3A-Mini - Manual (Page 13)

EUCHNER Identsystem CIS3A-Mini
084727-01-02/03 Subject to technical modification Page 13 / 22
4.2 Read operation
Command telegram (telegram core, PLC
® CIA3SX, see also figure 4):
TL (read/write head address) (start address) (number of bytes user data)
Response telegram (telegram core, CIA3SX ® PLC, see also figure 5 or figure 6):
There are two different possible responses for this command
1. RL (read/write head address) (start address) (number of bytes user data) (user data)
or
2. RF (read/write head address) (0,0) (status no.)
The response telegram RL (see also figure 5) means error-free reception of the data.
If it is not possible to read a data carrier, an RF response telegram is received
(see also figure 6). The status number then indicates the cause of the error.
Byte
No. Description
ASCII
C o n t e n t s
hex
decimal
0 Number of telegram bytes 07 7
1
2 Command
identification T
L 54
4C 84
76
3 Read/write head address 01 1
4
5 Start address of
user data 00
00 ... 70 0
0 ... 112
6
Number of bytes of
user data
01 ... 74 1 ... 116
Figure 4: Command telegram "read data carrier" (telegram core)