READ_PARAM: Reading the adjustment parameters

Description of the function

The READ_PARAM function is used to read the adjustment parameters of a module or integrated interface, by performing an explicit exchange with the processor memory.

The additional parameters and may also be configured.

Operation

Operation flow diagram:

FBD representation

Representation:

LD representation

Representation:

IL representation

Representation:

LD IODDT_Var

READ_PARAM

ST representation

Representation:

READ_PARAM(IODDT_Var);

Description of parameters

The following table describes the input parameters:

Parameter	Type	Comment
IODDT_Var	IODDT	IODDT-type variable corresponding to the channel or module whose adjustment parameters the user wishes to read. Example e: IODDT_Var of type T_COUNT_ACQ

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".