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Communications Mode CP 523

7.5 Overview of Permissible Job Requests in Communications Mode

Data exchange between the CPU and the CP 523 is always initiated by a job request from the CPU.

The CPU transfers the job request to the CP 523 in word 0. The job number is stored in byte 0.

Table 7-32. Permissible Job Requests to the CP 523 in Communications Mode

Byte 1

76543210

Byte 0

76543210

Day of the week

0 0 00

Job Request

Set the clock (settings in bytes 1 to 7)

Initialize the serial interface

Set the XON/XOFF parameters

Select Print mode

Select Transparent mode

Select Interpretive mode

Read status byte and coordination

information

Send message frame

Receive message frame

Read the status byte, the status of the

peripheral device and the current clock data

Coordinate data transfer

Transfer parameter setting data

Correction value for the integral clock positive

9 0 19Correction value for the integral clock neg.

7 3Select 3964(R) mode

9 0 9 0

Select 3964(R) mode follow-up

job request

9 0 7 2

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EWA 4NEB 811 6044-02a

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Siemens KS7 Series Specifiche Pagina 163