AEG 381 D Specifications download pdf (Page 38)

C.1.4 Trouble-shooting

Here, the most frequent faults are listed which occur during the first commissioning

and permanent operation:

 DIL switch no. 8 is set to ON or the rotary switch is to a position >3. If this is the

case, then the PCS enters a diagnosis routine after powering up. This is only

required for test purposes. Remedy: set DIL switch 8 to OFF or the rotary switch

to 0 and restart the PCS (by cycling power or pressing the momentary reset

push-button above the DIL switch).

 A time-out is reported in the programmable controller. In this case, the fault is

to be searched at the programmable controller - PCS connection. Maybe, the

cable is defective or plugged in incorrectly. Maybe, a wrong driver is also loaded

in the PCS. An incorrectly defined flag word area is also possible.

Warning!

Check the action/reaction of the programmable controller!

After restarting the programmable controller following a communication loss,

the desired programmable controller reaction/action is to be examined to

avoid malfunctions.

 The communication is active (PCS ERR LED is deactivated) but after a certain

time the following message appears on the upper display line of the PCS:

COMMUNICATION ERROR

An explanatory help text is shown on the lower display line:

TIMEOUT COMMUNICATION:

Transfer fault in the MODBUS 1 protocol. In this case, the PCS - programmable

controller connection is routed in a noisy environment, the cable length is too

long or the grounding is insufficient. Also, this message can result from a too

small or incorrectly defined flag word area in the programmable controller.

TIMEOUT PLC:

The determined time-out time (AA driver variable) was exceeded. This can occur

only in the SYNC operating mode and means that the synchronization word

(data word 3) was not processed in the programmable controller in time. Has

the handling software been loaded into the programmable controller? Is the

data area selected correctly? Is the restart input on 1 level?

A helpful diagnosis for the PCS 090/095/900 is the output of the PCS status on the

display. This display can be accessed by the following combination: press the

Help key after a PCS start (e.g. after a reset). The ERR LED must light constantly.

This option is available no more after starting the communication (ERR LED is

deactivated or flashes). By pressing the Help plus arrow keys you can display the

PCS version, the data block version, and the driver version as well as the selected

driver variables.

First commissioning

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 79 80

No comments

AEG 381 D Specifications Page 38