Specifications

D-2

D Buep 19e-Direct driver

Loading of the 5P90BUEP driver After selecting the 5P90BUEP driver in PCSPRO you have to set various

variables which are used by the drivers for the correct addressing of the

PLC. These are: baud rate, interface, cross-reference list, board address,

and timeout time.

Interfaces Interface and baud rate can be selected from combinations set with the

DIL switches 5 and 6 on the rearside of the PCS. The choice consists of:

RS-232C or TTY, 19200, 9600, or 4800 baud. The speed of the communi-

cation depends decisively on the baud rate. Select only on a slower baud

rate if you have longer distances between the participants. We recom-

mend to communicate with 19200 baud via TTY. With Sync you decide

for a synchronized data interchange between the PCS and the

programmable controller, Nosync disables the synchronization (see also

Chapter 4.2 and 4.3).

The relation baud rate to maximum distance is as follows:

Baud rate max. length RS232 max. length TTY

19200 15m 150m

9600 15m 300m

4800 15m 350m

When using a shielded and twisted cable with 14 x 0,14mm, a line

resistance of less than 138 /km, and a capacity of less than 120 pF/m.

Slot address The slot address (= block address) of the CPU to be addressed must be

passed on to the B19EDIR driver. Possible values are 0..3 for the CL

500, 30 for the CL 400, and 0 for the CL200 (default settings is 0). Once

you have set the address you can plug the communications cable into an

arbitrary BUEP19E interface in the rack (including the SK 500). Always

the CPU on this slot is addressed.

Timeout time The timeout time to be set is the time in which a complete communi-

cation cycle must have been started in the PLC. Thus, the timeout time is

composed of 1 PLC scan time plus the data transfer time. The timeout

time is settable between 2 and 9.9 seconds. 4 seconds is default value.

Data block number The number of the transfer data block must be passed on to the B19EDIR

drivers (default value=2). Possible values are in the range of 0 and 255.

The default setting is 1. The transfer data block consists of 256 data

words (= 512 bytes). The PLC and the PCS exchange information via this

block.