Siemens SIMATIC S5-115U, User Manual

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Integral Blocks S5-115U Manual
The RECEIVE Block - FB245 -
FB245 requests reception of data from a module with page addressing. A distinction is made bet-
ween two functions modes:
•
RECEIVE All
Data can be received for any job. This function block substitutes for direct memory access.
• RECEIVE Direct
Data is received for a specific job.
Calling Function Block FB245
CSF/LAD STL
: JC FB 245
NAME : RECEIVE
SSNR : KY 0,10
A-NR : KY 0,101
ANZW : FW 24
ZTYP : KS DB
DBNR : KY 0,10
ZANF : KF +100
ZLAE : KF - 1
PAFE : FY 23
:
***
FB245
RECEIVE
SSNR
A-NR
ANZW
ZTYP
DBNR
ZANF
ZLAE
PAFE
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Description of the RECEIVE ALL Function
The block needs the following parameters in RECEIVE ALL mode:
•
SSNR - interface number
• A-NR - job number (assign "0")
• ANZW - job status word
• PAFE - parameter assignment error byte
All other parameters are irrelevant for this job.
The CP provides the following information via the communications area:
•
address of the job status word
• type of data
• amount of data
• start address of the data area
The following bits are evaluated or set/reset in the status word for the pertinent job:
•
data transfer disabled
• data transfer completed
• data transfer in progress
The block enters the amount of data transferred for a job in the data word that follows the job
status word.
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EWA 4NEB 811 6130-02b