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Using the ”SEND” and ”Receive” Function Blocks CP 523

8.1.6 Flags in "SEND" FB 200

Explanation of the flags used by "SEND" FB:

Flags Symbol Meaning

F 255.0 H-FLAG-1

Auxiliary flag for buffering the

RLO at jump

F 254.0 H-FLAG-2 Auxiliary flag for STAT bit "SEND executing"

F 237.0 H-FLAG-3

Auxiliary flag for detecting end-of-text

characters

FY 254 H-BYTE-1 Auxiliary flag byte for buffering STAT

FW 240 B-AN-S "Number of send frames" register

FW 242 BADR-REG

Module address register (DO FW register for CP

access)

FW 244 QANF-REG

QANF register (auxiliary register data word block

pointer for Q-DW-IND)

FW 246 Q-DW-IND

Q data word index register (DO FW register for

fetching data words from the Q-DB)

FW 248 B-REST-R

Frame remainder register (number of data words

in the last message block)

FW 250 BYTE1IND

Byte 1 index register (CP byte address register for

data

transfer between CPU and CP, DO FW

FW 252 BYTE2IND

Byte 2 index register (CP byte address register for

data transfer between CPU and CP, DO FW

FW 254 HILFSREG Auxiliary flag word for calculating Q-DB lengths

FW 238 HILFREG

Auxiliary flag word for buffering the data words

to be transferred

FY 238.0 H-BYTE-2 Auxiliary flag byte for buffering CBS

8-10

EWA 4NEB 811 6044-02a

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Siemens KS7 Series Spezifikationen Seite 200