Siemens SIMATIC Ident Function Manual page 27

Table 3- 3 Variables in BEST
Variable
cancel
command_start
repeat_command
init_run
ASM_failure
FB45_active
ANZ_next
ANZ_reset
FB 45 for MOBY U, MOBY D, RF200, RF300
Function Manual, 07/2012, J31069-D0166-U001-A4-7618
Description
The cancel variable is not available. A command termination must be executed via the
init_run variable. The cancel command is not executed.
TRUE = Start a command or a command chain.
FALSE = Reset occurs automatically triggered by FB 45.
TRUE = Command repetition: The last command or command chain stored on the CM is
processed again with the next tag. Command processing for the tag is not started until the tag
that has already been processed has left the transmission window (ANZ_MDS_present = 0)
and a new tag has entered the transmission window of the reader (ANZ_MDS_present: 0 →
1).
In the case of RFID systems with unique tag IDs (UID) (e.g. RF300, MOBY U), the next tag
entering the field must have a different UID from the previous one for the command to be
repeated.
FALSE = No command repetition or command repetition is stopped after the command
started with the repeat command has been processed. Remember that this bit must be reset
by the user to stop command repetition. The result of command repetition is fetched when
command_start is set by the user.
The repeat_command is not automatically reset by FB 45 after command processing.
The init_run command resets the repeat_command variable. This also interrupts a command
repetition on the CM. The repeat_command can be set again by the application with the next
command_start.
The handling of command repetition is described in Section "Command repetition (Page 37).
Refer to the system manual of the relevant RFID/MOBY system.
RF200 does not support this function.
TRUE = Restart of the communications module. FB 45 is reset and the CM parameters are
reassigned. All data and commands on the CM are lost. This bit must be set in the restart OB
(OB 100) for each RFID channel.
After a failure of the MOBY ASM, error_MOBY=0F is signaled to the user. The user must then
perform an init_run.
FALSE = FB 45 triggers an automatic reset.
Note:
The init_run bit is initialized with TRUE when a parameter data block is downloaded from
•
the programming device to SIMATIC. This causes an automatic restart on the CM.
The execution time of init_run is normally in the millisecond range. In the event of an error,
•
the time may be up to 15s.
TRUE = The CM has failed. This bit is set by the user in OB 122 (see section "Programming a
module failure (Page 68)"). FB 45 signals an error to the user (error_FC = 09) and interrupts a
command in progress. If OB 122 is not programmed by the user, the PLC changes to STOP if
there is a CM failure.
FALSE = Reset occurs automatically triggered by FB 45.
FB 45 is currently executing a command. This variable is set when the command is started
(command_start=TRUE) and remains active until
FB 45 has received the last acknowledgment from the CM
•
the init_run bit has been set
•
An error message was signaled by the CM
•
The "next" command is not supported by the readers (MOBY U/D, RF200 and RF300).
This bit indicates that the last command to be executed was a RESET. The RESET command
was started by the user with "init_run".
Parameterizing
3.1 Parameter data block
27