Siemens S7-400 Load Memory, Local Data, Logic Block, Manufacturer--specific interrupt

Glossary

L

Load Memory

The load memory is part of the S7-400 CPU. It contains objects created by the programming device. It can be either a plug-in memory card or an integrated memory.

Contains the complete user program during runtime, the comments and the symbolic system, additional special information which allows decompilation of the user program, and all module parameters.

Local Data

→Data, Temporary

Logic Block

In SIMATIC S7, a logic block is a block that contains part of the STEP 7 user program. The other type of block is a data block which contains only data.

M

Manufacturer--specific interrupt

Can be generated by a DPV1 slave. The DPV1 master responds with a call of OB57.

For detailed information on OB57, refer to the “System Software for S7-300/S7-400 System and Standard Functions” reference manual.

Measuring Range Submodule

Measuring range submodules are plugged onto the analog input module for adapting to various measuring ranges.

Memory Card

Memory cards are storage media in credit-card format for CPUs and CPs. They are available as RAM or FEPROM.

Module Parameters

Module parameters are used to set the module reactions. A difference is made between static and dynamic module parameters.

Glossary-8	Automation System S7-400	Hardware and Installation
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