Rockwell-automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I Bedienungsanleitung PDF herunterladen (Seite 64)

Publication 1769-UM008A-EN-P - November 2001

5-4 Module Diagnostics and Troubleshooting

Critical vs. Non-Critical

Errors

Critical errors signal conditions that prevent normal or recoverable

operation of the system. When these types of errors occur, the system

leaves the run or program mode of operation until the error is

remedied. See Table 5.2 Extended Error Codes on page 5-5 for more

information on critical module errors.

Non-critical errors are recoverable and can be dealt with by running

the Fault routine. For example, a channel over-range condition is a

non-critical error. See Table 5.2 Extended Error Codes on page 5-5 for

more information.

I/O Module Errors

The analog I/O modules notify the host of critical and non-critical

module errors. Word 0 contains the error codes generated by the

module. The module errors are expressed as two fields: Mod_Error

(bits 9, 10, and 11) and Extended_Error_Info (bits 0 to 8). The

following table shows the error fields:

r = read only

Mod_Error Field

The Mod_Error field classifies module errors into three groups:

• No Errors (Mod_Error = 0): The module has no errors. There is

no need to check the Extended_Error_Info field.

• Hardware Errors (Mod_Error = 1): Check the

Extended_Error_Info field for general and specific error codes.

• Configuration Errors (Mod_Error = 2): Check the

Extended_Error_Info field for module-specific error codes.

1514131211109876543210

rrrrrrrrrrrrrrrr

0000001000000001

Mod_Error

Extended_Error_Info

Output_State

Mod_Configured

Bus_WD_Timeout_Latch

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 103 104

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Rockwell-automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I Bedienungsanleitung Seite 64