Effect Of The Commands - Siemens Simatic Ident Function Manual

The "PHYSICAL-READ" command
The "PHYSICAL-READ" command is used for the following functions:
● Reading codes
● Follow-on command after "activate read program number" for reading out the program
number
● Follow-on command after "activate read match string" for reading out the match string
Table 3- 87 PHYSICAL-READ
CMD OFFSET ADDR_TA
BUFFER G
0x70 Offset in 0x0000
the
"RXREF"
send
buffer
3.5.4.4

Effect of the commands

The commands used take effect as follows:
● The input parameters "INIT" and "RESET" interrupt command execution within the
communications module.
● The completed message that follows the "INIT" or "SRESET" ("DONE" or "ERROR")
always relates to the input parameter "INIT" or "SRESET" and not to the interrupted
command.
● The input parameter "INIT" resets communication between the Ident profile and the
communications module. Following "hard" resetting of the communications module, the
Ident profile automatically transfers the "WRITE-CONFIG" command to the
communications module. This is why it is absolutely necessary that you store the
"WRITE-CONFIG" command in the first element of the command buffer "CMDREF".
● The "WRITE-CONFIG" command resets all functions within the communications module,
with the exception of the communication.
● The parameter "SRESET" interrupts a running command.
Ident profile and Ident blocks, standard function for Ident systems
Function Manual, 10/2018, C79000-G8976-C387-04
LEN_DATA
Length of the data to be fetched from
the reader:
≥ code length +2
•
= 0x01
•
≥ Match string length +2
•
Setting parameters for blocks
3.5 Programming the Ident profile
RXREF
Data fetched from the reader:
Code data
•
Program number
•
Match string
•
103