Specifications

B-3

B Buep 19-Expander driver

Connection to the PLC 1. Set DIL switches 8 and 9 on the rear side of the PCS to OFF. The

DIL switches 5 and 6 are set according to the selected baud rate and

interface. Initiate a PCS reset.

2. Supply operating voltage (19..33V) to the PCS. At least the ERR

LED must light now.

3. Connect the programming interface of the programmable controller

to the PCS using a suited cable.

4. Now, the ERR LED at the PCS must be activated.

Trouble-shooting Errors which might occur during first commissioning are listed below:

1. DIL switch 8 is set to ON. In this case, the PCS starts a diagnosis

routine after being switched on. This routine is only required for test

purposes. Remedy: Set the DIL switch to OFF and restart the PCS

(by switching it off for a short time or by shortly pressing the RESET

push-button located above the DIL switch).

2. The DIL switches 5 and 6 (interface and baud rate selection) are not

correctly set. Check the settings at the PCS using the HLP key and

arrowdown key.

3. Is the correct cable being used? This is PCS 706 for TTY (observe

the polarity) and LCA 035/235 for RS-232 (polarity not important) or

a cable as described in chapter 2.5.

4. Has the correct program being loaded into the programmable

controller? Has the programmable controller being switched off

following a „Program load“? Does the P2 parameter indicate a „Rest-

art after fault“?

5. DW 3 of the PCS data block shows a value <> 0KH in case of an

error. If this the case the error is to be searched in the programmable

controller to PCS connection. The cable is possibly defective.

6. Communication is established but after a certain time the PCS

displays the following message:

======== COMMUNICATION ERROR =========

In this case, please read the following section.

Communication ERROR When communicating with each other the PCS operates as master (AST)

and the programmable controller as slave (PST). Thus, it is the PCS´s

task to set up the communication and to perform monitoring. Thereby, 3

criteria must be monitored: is communication active, is communication

processing in the programmable controller active, and does the

programmable controller indicate faults. Data are transferred to/read from

the programmable controller via the BUEP 19 protocol. The timeout times

for the protocol are fixed (3.2s max.) which allows no statement about

data processing. Therefore, the processing timeout is set using the

PROJECT/DRIVER PARAMETER menu in PCSPRO.