MINEGEM Machine Control ; Guidance Products Area Isolation System Caterpillar


Using the Operator Monitor to Determine Diagnostic Codes

Usage:

- MXX

Area Isolation System (AIS) Monitor




Illustration 1g01987074

(1) AIS monitor

(2) Diagnostic code window

AIS monitor (1) is located in the automation operator station and displays the status of the AIS. When a breach of a barrier occurs, or a shutdown switch is depressed, AIS computer will change the status of the alert indicators. The alert indicators are displayed on AIS monitor (1) .

Diagnostic code window (2) displays information that can be used to diagnose a fault.

Diagnostic Code Window




Illustration 2g01987075

(3) Diagnostic code toolbar

(4) Active, acknowledged diagnostic code

(5) Active diagnostic code

(6) Resolved diagnostic code, not yet acknowledged

Diagnostic code window (2) displays diagnostic codes that can be used to isolate faults. Active diagnostic code (5) is displayed in red. Active, acknowledged diagnostic code (4) is displayed in blue and indicates an unknown status fault preventing a status display. Resolved diagnostic code, not yet acknowledged (6) is displayed in green.

Diagnostic code toolbar (3) is used to display:

  • active diagnostic codes

  • a history of cleared diagnostic codes

  • acknowledgment of resolved diagnostic codes

  • a printout of diagnostic codes

Diagnostic Code Messages




Illustration 3g01987093

Typical example

(7) Date

(8) Time

(9) Diagnostic code information

(10) Identification information

A diagnostic code message displays:

  • Date (7) and time (8) of the fault

  • Diagnostic code information (9)

  • Identification information (10) identifies the equipment reporting the fault

A typical diagnostic code message has information as shown in Table 1 for each section of the diagnostic code message.

Table 1
Diagnostic code Message    
Code     Purpose    
03/01/09 (7)     Indicates the diagnostic code date.    
09:14:07 (8)     Indicates the diagnostic code time.    
IO device A2E1of2 (9)     This code indicates that the fault relates to an IO module attached to A2E1of2    
Slot 2 (A2E1of2Input)     Indicates a module and location. Slot 2 means the Digital Input (DI) module. The location is called A2E1of2Input to give a more readable indication in the input module.    
on Channel 2 :     Indicates that the fault is specific to Channel 2, that is, the lanyard.    
Fail-safe shutoff     This code means that one input was high, the other input is low which is an error.    
Identification Info :     Identifies the equipment reporting the diagnostic code.    
Short name 4/8 F-DI DC24V     The short name indicates the name printed on the top left corner of the module.    
Order number : 6ES7 138-4FA02-0AB0     The order number provides the exact part number to identify a replacement in stores if the module has failed.    

This diagnostic code in Table 1 indicates that the input connections to the lanyard in Barrier Control Panel (BCP) A2E1of2 need to be checked. Check the indicator lights to find out which channel is high and which channel is low. Fault finding can commence from this point.

PROFINET IO Device Failure

A diagnostic code message may not indicate a slot or a channel. This section of the diagnostic code message would read: Device A6E4of4 : PROFINET IO device failure.

This error relates to the IO module in a BCP. This error indicates that the AIS Programmable Logic Controller (PLC) is unable to communicate with the BCP via Ethernet. This error could be because:

  • the specific BCP is not used in the current setup

  • the BCP is currently isolated

  • the Local Area Radio Network (LARN) communication has been lost.

Parameter Assignment Error

A parameter assignment error may be shown: IO device A2E1of2 – Slot 3 on Channel 0 : Parameter assignment error.

This error shows Slot 3 (DO) of A2E1of2 in the module does not have the dip switches set correctly to match the Multi Media Card (MMC) card, that is, A2E1of2.

Slot/Channel Conventions

Refer to Table 2 for information on slot and channel conventions.

Table 2
Slot/Channel Conventions    
Slot     Module Type     Channel     Use    
Slot 1     Power Supply Module            
Slot 2     Digital Input     Channel 0     Shutdown Switch    
Slot 2     Digital Input     Channel 1     Gate/AIS LADAR    
Slot 2     Digital Input     Channel 2     Lanyard    
Slot 2     Digital Input     Channel 3     Shutdown Reset    
Slot 2     Digital Input     Channel 7     Expander Feedback    
Slot 3     Digital Output     Channel 0     Expander Enable    
Slot 3     Digital Output     Channel 1     Transmitter Start    
Slot 3     Digital Output     Channel 2     Strobe Relay    

Common Diagnostic codes Displayed on the AIS Monitor

Refer to Table 3 for a list of the more common diagnostic codes. These codes can be detected by the hardware and are reported on the AIS Monitor. Most diagnostic code messages specify a slot which will identify the module. Some diagnostic code messages will identify a channel which indicates the connection to the faulty module.

Table 3
Common Diagnostic codes    
Diagnostic code Message     Action    
PROFINET IO device Failure     The AIS PLC is unable to communicate with a BCP with the specified identity. Identity is controlled by the MMC card installed in the BCP.    
Fail-Safe shutoff     One input for the specified device is high and the other is low    
Communications Error     The IO Module is unable to talk to the specific module in the given slot, that is, the DI module is not responding. Check for an electrical fault causing the module fuse to trip. The fuse can be reset by removing from the unit for 1 minute and then reinserting. Otherwise the error indicates that the module has failed.    
Parameter assignment error     The DI or Digital Output (DO) module in the slot specified has the wrong dip switches set for the given BCP identity.    
PROFINET IO module removed     The DI, DO, or power supply modules are physically removed.    
Wire-break     No output load is detected on the given output. A wire is disconnected or the device connected to has failed to open-circuit    
Short-circuit     Sensor or load voltage missing. The specified input output has shorted to ground.    

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