Rockwell-automation 1794-L34 FlexLogix Controller System User Manual Bedienungsanleitung PDF herunterladen (Seite 80)

Publication 1794-UM001G-EN-P - January 2007

80 Develop Applications

Monitor Connections

If communication with a device in the I/O configuration of the

controller does not occur for 100 ms or 4 times the RPI (whichever is

less), the communication times out and the controller produces the

following warnings:

• The I/O LED on the front of the controller flashes green.

• A

shows over the I/O configuration folder and over the

device (s) that has timed out.

• A module fault code is produced, which you can access

through:

– Module Properties dialog box for the module

– GSV instruction

Determine if communication has timed out with any device

If communication times out with at least one device (module) in the

I/O configuration of the controller, the I/O LED on the front of the

controller flashes green.

• The GSV instruction gets the status of the I/O LED and stores it

in the I_O_LED tag.

• If I_O_LED equal 2, the controller has lost communication with

at least one device.

where:

I_O_LED is a DINT tag that stores the status of the I/O LED on

the front of the controller.

Determine if communication has timed out with a specific

I/O module

If communication times out with a device (module) in the I/O

configuration of the controller, the controller produces a fault code for

the module.

• The GSV instruction gets the fault code for Io_Module and stores

it in the Module_Status tag.

See:

• Logix5000 Controllers Common

Procedures Manual, 1756-PM001

• Logix5000 Controllers Design

Considerations Reference Manual,

Get System Value

CIP Object Class MODULE

CIP Object Name

Attribute Name LedStatus

Dest I_O_LED

GSV

Equal

Source A I_O_LED

Source B 2

EQU

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 129 130

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