Siemens S7 PLC Tag

Introduction

The Siemens S7 PLC Tag provides a logical link to a Siemens S7 PLC. You do not create a Siemens S7 PLC Tag directly. The Siemens S7 PLC Tag is a building block used for other tags. See Relationships to Other Tag Types for more information.

Configuration Properties

The Siemens S7 PLC Tag supports the configuration properties of the PLC Device Tag with RTC.

Tag Commands

The Siemens S7 PLC Tag supports the tag commands of the PLC Device Tag with RTC plus these tag commands:

Tag Command	Version	Description
DirectWriteBit	2.3	Directly writes a single bit to an address in the PLC.
DirectWriteByte	2.3	Directly writes one or more bytes to an address in the PLC.

Relationships to Other Tag Types

The Siemens S7 PLC Tag builds on the features of these tag types:

The Siemens S7 PLC Tag is used as a building block for these tag types:

Further Information

For properties common to all PLC Devices with clock synchronization.

Siemens S7 Serial PLC Device.

To learn about Siemens S7 PLC Devices connected via serial communications.

Siemens S7 Ethernet Device

To learn about Siemens S7 PLC Devices connected via Ethernet.

For the meaning of terms used in Fernhill SCADA.