Topic: DMD0140

Help File Version: 2.9.4.37

DATAINFO - Query Information about Data Memory

The Query Information about Data Memory (DATAINFO) instruction is used to determine the size or Schema ID of a Data Block or a Heap Item.

Parameters:

Memory Type selects which area of the Do-more CPU contains the memory item to query:

• Data Block is a drop-down list that will display all of the Data Blocks that are currently configured.

Information Type selects what information about the data block to query for :

Number of Elements in Block is the number of individual elements in the memory block.

Number of BYTEs in Block is the total number of BYTEs of memory the data block consumes.

Number of BITs in Block is the number of BITs of memory the data block consumes.

Data Type ID (Schema ID) is the internal ID number assigned to the data block (see below for a list of Schema IDs).

Block Number is the unique identifier for this data block.

• Heap Item is a drop-down list that will display all of the Heap Items that ere currently configured.

Information Type selects what information about the Heap Item to display.

Number of Bytes in Heap Item is the number of BYTEs of memory the Heap Item consumes.

Data Type ID (Schema ID) is the internal ID number assigned to the data block (see below for a list of Schema IDs).

Output specifies a numeric memory location to store the result. This can be any writable numeric location.

Input Leg selects which of the following power-flow conditions will cause this instruction to run:

• Edge Triggered means the instruction will run to completion each time the input ladder logic transitions from OFF to ON.
   
• Power flow enabled means the instruction will run repeatedly as long as the input ladder logic remains ON.

Status Display:

See Also:

HWINFO - Get Hardware Information

Memory Configuration

Data Blocks

 

Heap Items

 

User Data Types

Rung Example: