Process interfacing via an automation system (PLC, PC)
9.3 Control with Ident profile
SIMATIC MV500
Operating Instructions, 06/2018, C79000-G8976-C494-01
115
Requirement for matching with 1D/2D codes
All match options ("All", "Position", "ID", "GS1") are supported for 1D/2D codes. The match
string that is sent must be formatted in such a way that the information required for the
match can be extracted.
Command: Write match string
●
This MV command allows the match string of the currently loaded program (non-
persistent) to be overwritten. This command can only be executed when the optical
reader is in processing mode. If the reader exits processing mode, for example by
changing to STOP mode or to the group error status, the overwritten match string is
discarded. This also applies to a program change.
●
The structure of the memory area is outlined in the table below.
●
The total length of the data to be written is the overall length of the match 3 bytes
for the length and the command identifier ("CMD_STRUCT.LEN_DATA = n + 3").
●
If the new match string is applied to the current program, the command receives positive
acknowledgment.
If the match string cannot be overwritten, an extra entry is made in the diagnostic data.
Table 9- 14 CMD_STRUCT
Parameter
Value
CMD
0x71
OFFSETBUFFER
0x00
EPCID_UID
0x00
LEN_DATA
Match string 3
ADDR_TAG
0x00
Table 9- 15 Memory area of the receive data (TXREF or RXREF)
Address
Value
Meaning
0x0000
0x03
Command identifier
"Write match string"
0x0001
0x00 ... 0xFF
Length of match string high byte
0x0002
0x00 ... 0xFF
Length of match string low byte
0x0003
--
1st character of the match string
...
--
...
n + 2
--
(n-1)th Characters of the match string
n + 3
--
nth Characters of the match string
Содержание SIMATIC MV540 H
Страница 24: ...Description 1 7 Functional description SIMATIC MV500 24 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 194: ...Service and maintenance 10 3 Replacing a module SIMATIC MV500 194 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 232: ...Appendix A 3 Alternative user interfaces SIMATIC MV500 232 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 236: ...List of abbreviations SIMATIC MV500 236 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 238: ...Service Support SIMATIC MV500 238 Operating Instructions 06 2018 C79000 G8976 C494 01 ...