Error messages and indications
The signal levels of these identifiers are not available. The list with the signal levels
will show you the affected identifiers as follows:
<identifier> : -.- Vd [BIT?]
: -.- Va [BIT?]
The BIT? indication is not an error message. The CAN network may be perfect.
However, the CANcheck cannot check one or more signal levels.
To achieve a result, you should care about dominant bits in the first data byte. If
the bits in the first data byte are random anyway it is sufficient to repeat the test
once or more often. One of these tests will measure a bit stream with two domi-
nant bits in a sequence.
In operating mode "CANopen" the BIT? indication is presented as follows.
Signal levels per
▼
N= Node ID
Vd: CAN_H -> CAN_L
Va: CAN_H -> CAN_GND
7 Node IDs found
6 Node IDs OK
1 Node IDs BIT?
Signal levels per
▼
▲
N 48: 2.3Vd[OK]
: 3.7Va[OK]
N 119: -.-Vd[BIT?]
: -.-Va[BIT?]
N 127: 2.5Vd[OK]
: 3.9Va[OK]
Please note: The signal level measurement is not possible if the identifier is fol-
lowed by the data length code 0.
Copyright IXXAT Automation GmbH
CANcheck Manual, Version 1.2
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