User's Manual

35
35
english
Function Description
Processing data carriers
Read from data
carrier, with program
Mixed Data Access
Write to data carrier,
with program Mixed
Data Access
The command identifier 21Hex can be used to read out the program records stored in the
program from the data carrier. The user must document exactly which data are to be read
from where and with what number of bytes for the respective program (see example 8 on
48)
The command identifier 22Hex can be used to write the program records stored in the program
to the data carrier. The user must document exactly which data are to be written from where
and with what number of bytes for the respective program (see example 9 on
49)
To be able to use the CRC_16 check, the data carrier must first be initialized with the
command identifier 12
Hex (see 37). The CRC_16 initialization is used like a normal write job.
The latter is rejected (with an error message) if the processor recognizes that the data carrier
does not contain the correct CRC_16 checksum. Data carriers as shipped from the factory
(all data are 0) can immediately be written with CRC-checked data.
If CRC_16 data checking is activated, a special error message is output to the interface
whenever a CRC_16 error is detected.
If the error message is not caused by a failed write request, it may be assumed that one or
more memory cells on the data carrier is defective. That data carrier must then be replaced.
If the CRC error is however due to a failed write request, you must reinitialize the data carrier
in order to continue using it.
CRC_16 initialization
L60_2-019_828132_1007-e.p65
36
english36
Data-carrier models
BIS L-10_-01/L
CT present
Model BIS L-10_-01/L data carriers have a memory capacity of 192 bytes of user data.
These data can be read or programmed. These data carriers also have a unique, 4-byte
serial number, which is read-only.
The data carrier also contains additional memory ranges for configuration and protected
data. These areas cannot be processed using the BIS L-60_2 processor.
Model BIS L-10_-01/L data carriers are supplied with FF
Hex 37Hex configuration. Only data
carriers having this configuration are processed.
At CT Present the first user data are read from the data carrier and stored in the Profibus
input buffer (see
31). If the “Output data-carrier model and serial number at CT present”
function is enabled, model 01
Hex is output in Byte 1 of the input buffer and then the 4 bytes
representing the unique serial number.
The full command set of the BIS L-60_2 processor can be used with model BIS L-10_01/L
data carriers.
When using model BIS L-10_-01/L data carriers, the device parameterizing depends
mainly on the number of bytes to be read and programmed per head.
Please refer to 13ff and 23ff.
Functions
Device parameters
☞
Data carrier
BIS L-10_-01/L