Siemens KS7 Series Specifikace stáhnout pdf (Strana 85)

Print Mode CP 523

6.5 Processing Job Requests in Print Mode

The CP 523 handles data transfer with the printer autonomously. Data transfer between the CPU

and the CP 523 must always be initiated by the CPU. The CP 523 has an eight-byte transfer

memory, which can be used by the CPU and the CP 523.

Figure 6-6. Schematic Representation of Job Order Processing in Print Mode

Send

print requests

S5-CPU CP 523

Peripheral

device

Receive

print requests

Transfer

memory

Serial

interface

Message

buffer

Internal bus

Job

buffer

The CPU transfers the following in the transfer memory

• Word 0: the job request, e.g.: "Print message text No. 20"

• Words 2,4,6: further necessary or possible information on the job,

e.g.: value of a variable to be inserted in the message text at printout.

The CP 523 writes the following to the transfer memory after a job has been executed:

• Byte 0: Status of the module

• Byte 1: Status of the printer and current day

• Byte 2 to 7: The remaining current clock data

6-30

EWA 4NEB 811 6044-02a

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 256 257

Žádné komentáře

Siemens KS7 Series Specifikace Strana 85