Siemens KS7 Series Specifikace stáhnout pdf (Strana 166)

100

101

CP 523 Communications Mode

Figure 7-8. Schematic for "Send Message Frame"

START

* 5.2

Yes

CPU reads the transfer memory and evaluates

the coordination bytes (bytes 0 and 1)

CPU transfers message frame length or end-

of-text character to the transfer memory on

the CP (words 2 and 4)

CPU transfers message block to the transfer

memory of the CP

CP transfers data from the transfer memory

to the Send mailbox

CP transfers data from the Send mailbox to

the peripheral device

Transfer another

message block to the

transfer memory?

CPU transfers the "Send message frame"

request to the transfer memory of the CP

(word 0*)

Has the

CP accepted

the Send job?

(bit 0 in byte

1=1)

END

EWA 4NEB 811 6044-02a

7-61

1 2 ... 161 162 163 164 165 166 167 168 169 170 171 ... 256 257

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