Individual tests
5.11 CANopen - signal levels per node ID
In the operating mode "CANopen" (selected via the menu item "Settings"), the
CANcheck measures the differential and the absolute signal levels of all recorded
node IDs. First the CANcheck generates a list of node Ids during the scan time
(the default setting is 10 s). This is only possible if the nodes transmit the follow-
ing identifiers:
•
Identifier that the node transmits with "Node guarding protocol" or with
"Heartbeat protocol"
- or -
•
Identifier that the node transmits with access via the first server SDO and
that is formed according to the "Pre-defined connection set".
Then the CANcheck measures the differential and absolute signal levels for every
recorded node ID separately as often as averaging requires (the default setting is
3).
If the above-mentioned identifiers are repeated in your CAN network with a pe-
riod of more than 10 s, you must change the scan time. This is done via the
menu item "Settings". You can also change averaging via the menu item "Set-
tings".
The CANcheck analyzes the signal level for each identifier separately. The limits
are given in section 10.1. In this way you can detect identifiers that are transmit-
ted with a weak signal level and may be causes of transmission errors.
For measurement of the signal levels, you can connect the CANcheck to the CAN
network at any point.
•
If there is a free SUB-D9 socket in the CAN network, you can connect the
CANcheck to this socket via the 1-to-1 cable.
•
If this is not the case, you can loop in the CANcheck between any CAN node
and the CAN network via the Y cable.
Please put the CAN network into operation before you start measurement of the
signal levels.
Please select the menu item "Signal level per node ID" with the keys UP and
DOWN and press the OK key.
Individual tests
▼
▲
►
-Line impedance
-Power supply
-Baudrate detection
-Identifier scan
-Bus load
-Signal levels per no
Copyright IXXAT Automation GmbH
CANcheck Manual, Version 1.2
47
