General Structure Of The Add-On Instructions - Siemens SIMATIC Ident Function Manual

Configuring the instructions

4.3 General structure of the add-on instructions

4.3 General structure of the add-on instructions
Form of the instruction as an example
The following graphic shows an example of a instruction with input and output parameters as
they exist in the same way in all instructions.
Figure 4-1
Description of the parameters
Table 4- 2
Parameter
Input parameters
EXECUTE
HW_CONNECT
MSG_READ
MSG_WRITE
STATUS_WORD
CONTROL_WORD
Output parameters
DONE (BOOL)
BUSY (BOOL)
ERROR (BOOL)
WARNING (BOOL)
STATUS (DINT)
PRESENCE (BOOL)
16
Example instructions
Description of the input and output parameters
Description
There must be a positive edge at this input before the instruction
executes the command.
Global parameter of the type "IID_HW_CONNECT" to address the
channel/reader and to synchronize the instructions. This parameter is
located in the variables of the type "IID_DATA_*". "HW_CONNECT"
must always be transferred to the instructions to address the relevant
channel/reader.
Message variable for communication between controller and
CM/reader
Message variable for communication between controller and
CM/reader
Cyclic status word which is sent from the CM/reader to the controller.
Cyclic control word which is sent from the controller to the CM/reader.
The job was executed. If the result is positive, this parameter is set.
The job is being executed.
The job was ended with an error. The error code is indicated in Sta-
tus.
The job was ended with a warning.
Display of the error message if the "ERROR" bit was set.
This bit indicates the presence of a transponder. The displayed value
is updated each time the instruction is called. This parameter does
not occur in specific instructions for optical readers.
Ident profile, Add-on instruction for Rockwell systems
Function Manual, 01/2019, C79000-G8976-C410-03