Programming FCs (Functions) and FBs for S7 Ethernet CPs

SCase a: Sequence with older CP types

The send job is executed as soon as the parameter ACT = 1 is passed.

Following this, the parameter ACT = 0 must be passed in at least one further call.

The status code in the output parameters DONE, ERROR and STATUS is updated in each block call and can be evaluated. To update the status code without starting a new send job, start a new block call with the parameter ACT = 0.

Refer to the sample program at the end of Section 6.3.1.

User program

Ethernet CP

Communications Partner

(CPU cycle)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply AG_SEND with

 

 

 

 

 

 

 

 

 

data “X

 

 

 

 

 

 

 

 

 

ACT = 1

 

 

 

 

 

 

 

 

 

 

 

 

AG_SEND

 

 

 

 

 

 

 

 

 

 

Job active1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transfer

 

 

Supply AG_SEND

 

 

 

 

 

 

 

 

 

 

 

 

 

X

 

 

ACT = 0

 

 

 

 

 

active on

 

 

 

 

 

AG_SEND

 

 

 

Ethernet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Job active1)

 

 

 

 

 

 

AG_SEND

Job completed without error1)

Time

Time

Time

Legend:

1) parameter transfer DONE, ERROR, STATUS

176

SIMATIC NET NCM S7 for Industrial Ethernet

Release 6/2003

C79000–G8976–C129–07

Page 176
Image 176
Siemens NCM S7 appendix Agsend, Time

NCM S7 specifications

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