Specifications

1070 072 131-102 (96.08) GB

BUEP03E Protocol8-12

8.7.2.1 Interlinking via BÜP03E START Command

The associated job parameter lists are filed contiguously one after the

other in the PLC memory (DM, DB, DF). Each job parameter list specifies

a command (==> job). The sequence of the commands in the PLC me-

mory specify the positions of the commands. Application-specific combi-

nations of the command positions can be stipulated with the Start

command.

If the Start command is now started by means of the R5REQ function

module, the command chain, indicated via identifiers, is retrieved from

BÜP03E and executed according to the stipulated sequence.

R5REQ parameter

PW1 - PW3

Command 1

Receive

Command identifier ‘ST’ Command 2

Receive mode

Identifier for the

command chain

Command 3

Reset Receive Buffer

No. of parameter list: 4 Command 4

Transmit

FFH 4

Start command Job parameter lists are located

directly behind each other in

the job memory (DM,DF,DB)

Fig. 8-6 BÜP03E — Interlinking command

The jobs are processed in the following sequence: 2, 1, 4, End

With this method the maximum job memory is restricted to one data mo-

dule ( = 512 bytes). A maximum of 16 commands can be defined per job

memory and, depending on the application, can be linked to each other.

This method unloads the system bus by transferring all the job parameter

lists once. A command may occur several times in the command chain.

During the active phase of Receive, the following individual commands

can be started parallel to the commenced command chain:

- Data Copy

- Transmit

- Reset Receive Buffer

- Receive Mode

- Formatted Output

Parallel operation is only possible with Receive in the command chain, not

in single command mode.