Rockwell-automation 1788-CNCHKR ControlNet NetChecker User Manual Instrukcja Użytkownika Pobierz pdf (Strona 19)

ControlNet NetChecker 19

Rockwell Automation Publication 1788-UM001B-EN-P - August 2012

If status indicator 1 is green, the minimum level is between 0.75Vpp and 2Vpp (this is still

acceptable). If status indicator 1 is red, however, at least one signal is being received at a level less

than 750mVpp. To identify the nodes that are producing the low signals scan all of the node

addresses on the network with the Node Finder. If it is necessary to ensure that the signal at each

node input meets the ControlNet Receive Mask specification (510mVpp at minimum), verify

the minimum level with an oscilloscope connected to the NetChecker.

If status indicator 7 (top of the scale) turns red, a level of signal greater than 9.5Vpp was detected.

This may indicate a strong mismatch on the network. Check if terminations are present.

TRAFFIC

Low Bat

Node On Line

Diagnostic

LMH

Threshold

INPUT

Rockwell

Automation

Push ON

Buzzer

Ext

5VDC

0.25A

Power

Min

1 2

Signal

(x1/4 )

GND

Trigger

Output to Scope

Node Finder

Power Switch

OFF

Push ON

Bargraph

Pass/Fail

Slow Edges

Illegal Framing

Poor Signal

Quality

llen

Control

Net

Checker

TRAFFIC

Low Bat

Node On Line

Diagnostic

LMH

Threshold

INPUT

Rockwell

Automation

Push ON

Buzzer

Ext

5VDC

0.25A

Power

Min

0 0

Signal

(x1/4 )

GND

Trigger

Output to Scope

Node Finder

Power Switch

OFF

Push ON

Bargraph

Pass/Fail

Slow Edges

Illegal Framing

Poor Signal

Quality

llen

Control

Net

Checker

Allen-Bradley

Bargraph: Global Mode

Bargraph: Node Level

1 2 ... 14 15 16 17 18 19 20 21 22 23 24

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