EUCHNER CIS3(A) - Manual (Page 10)

EUCHNER Identsystem CIS3
071652-01-8/99 Subject to technical modifications page 10 / 23
5. Commands for writing and reading the data carrier
Read and write operations are always initiated by the higher-level control
(NC, PLC) with a "command telegram".
The read/write head then sends a response telegram to the control.
Control Read/write head CIT3SX...
Command telegram
→
Response telegram
←
5.1 Write operation
The data carrier must be in front of the read/write head in the case of this command and
may be removed from the active area only after reception of the response telegram.
Command telegram (telegram core, PLC → CIT3SX , see also Figure 5):
TP (read/write head address) (start address) (number of Bytes user data) (user data)
Response telegram (telegram core, CIT3SX → PLC, see also Figure 6):
RF (read/write head address) (0.0) (Error No.)
Content or possible value range
Byte
No. Description
ASCII
C O N T E N T S
HEX
Decimal
0 Number of telegram Bytes 8 ... 23
1
2 Command
identification T
P 54
50 84
80
3 Read/write head address *) 01 01
4
5 Start address of the
user data 00
0 ... 5Fh 00
0 ... 95
6
Number of Bytes of the
user data
1 ... 10h 1 ... 16
7 ... 22 User data ASCII or HEX resp. BCD (code-transparent) **)
Figure 5: Command telegram "Write data carrier" (telegram core)
*) For downward compatibility with the CIS2 identification system.
The content of the header address must always be 1 in the case of CIS3.
**) If read/write head CIT3SX.. is used in conjunction with read head
CIT3PL, please note that a Byte comprises 2 BCD digits (0 ... 9) when
programming the user data.