Programming FCs (Functions) and FBs for S7 Ethernet CPs

Note

In principle, it is possible to call the FC more than once within the CPU cycle to speed up the handling of the job. Do not forget, however, that this increases the load during the CPU cycle (the load differs depending on the CPU type)!

Explanation of the Formal Parameters

The following table explains all the formal parameters for the AG_SEND /AG_LSEND functions.

Parameter

Declara-

Type

Possible

Remarks

 

tion

 

Values

 

 

 

 

 

 

ACT

INPUT

BOOL

0,1

If an FC is called with ACT=1, LEN bytes are

 

 

 

 

sent from the ISO transport data area specified

 

 

 

 

with the SEND parameter.

 

 

 

 

If an FC is called with ACT = 0, the status

 

 

 

 

codes DONE, ERROR and STATUS are

 

 

 

 

updated.

 

 

 

 

 

ID

INPUT

INT

1,2...64

The connection number of the connection is

 

 

 

(S7-400)

specified in the parameter ID. (see

 

 

 

1,2...16

Configuration Section 4.3.1

 

 

 

 

 

 

 

(S7-300)

 

 

 

 

 

 

LADDR

INPUT

WORD

 

Module base address

 

 

 

 

When you configure the CP with STEP 7

 

 

 

 

hardware configuration, the module base

 

 

 

 

address is displayed in the configuration table.

 

 

 

 

Specify this address here.

 

 

 

 

 

SEND

INPUT

ANY

 

Specifies the address and length.

 

 

 

 

The address of the data area refers to one of

 

 

 

 

the following:

 

 

 

 

– Process image area

 

 

 

 

– Bit memory

 

 

 

 

– Data block area

 

 

 

 

 

178

SIMATIC NET NCM S7 for Industrial Ethernet

Release 6/2003

C79000–G8976–C129–07

Page 178
Image 178
Siemens NCM S7 appendix Explanation of the Formal Parameters, Parameter Declara Type Possible Remarks Tion Values

NCM S7 specifications

Siemens NCM S7, which stands for Siemens Network Control Module for the S7 series, represents a significant advancement in industrial automation technology. This robust control system is designed to enhance productivity and efficiency in various manufacturing processes. Its primary purpose is to facilitate seamless communication between field devices and higher-level control systems, ensuring that processes run smoothly and effectively.

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Moreover, the user-friendly interface simplifies configuration and programming tasks, allowing engineers and technicians to set up and troubleshoot the system with ease. Siemens has also invested in comprehensive support and training resources to help users maximize the system’s potential.

In conclusion, the Siemens NCM S7 stands out as a pivotal element in modern industrial automation. With its robust connectivity, advanced data processing capabilities, cybersecurity features, and flexibility, it empowers businesses to optimize their production processes and embrace the future of Industry 4.0.