Prosoft-technology PS69-DPS User Manual download pdf (Page 58)

Diagnostics and Troubleshooting PS69-DPS ♦ CompactLogix or MicroLogix Platform

User Manual Profibus DP Slave Communication Module

Page 58 of 108 ProSoft Technology, Inc.

May 9, 2014

4.2 Troubleshooting

Troubleshooting of the system is done by examining the LEDs on the front panel

of the CPU and the LEDs on the front of the module. The following sections

contain some troubleshooting ideas.

4.2.1 CompactLogix I/O LED

Communication between the module and controller is displayed via the I/O LED

of the Controller. The proper communication state is reached, if the I/O LED of

the CompactLogix Controller is static Green. If this LED is flashing or off, no

communication has been established between controller and the Slave Module.

4.2.2 MicroLogix Fault LED

When the Fault LED of the MicroLogix Controller is off, the module is not in a

fault state.

If there is a problem with the expansion module, the Fault LED will be flashing

red. To diagnose the error, go online with your RSLogix500 project and open up

the processor status dialog box. Click the Error tab to view the fault reason.

4.2.3 SYS and COM Status LEDs

This PS69-DPS module has two bicolor status LEDs. They inform the user about

the communication state of the module.

 The SYS-LED shows the common system status of the card. It may flash

yellow or green.

 The COM-LED displays the status of the PROFIBUS communication. It can

be solid green or off.

If the SYS-LED is solid Green and the COM-LED solid green, the card is in cyclic

data exchange with the Master and the communication is running with outfault.

4.2.4 Error Sources and Reasons

This section describes typical problems, error sources and questions that come

up while commissioning the PROFIBUS-DP Slave module PS69-DPS. The

following table summarizes the typical error sources and gives a hint of possible

reasons for the problem.

Behavior

Significance

Typical Reason

Help

CompactLogix

I/O LED is flashing Green

No communication with the

PS69 module (or other

modules)

Modules slot number in

RSLogix program does not

match with the physical slot

of the module

Configured Input / Output /

Configuration array size is

wrong

Check modules slot number

in RSLogix project

Compare configured Input /

Output size with required

values

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 107 108

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