cann-bus communication
© Hirschmann Rev. I 05/22/17
190154_I.DOC
17
12 CANN-BUS COMMUNICATION
The System measures the length of the main boom, the angle of the main boom, the pressures of the
lift cylinder, and the A2B state of the machine via a CAN-Bus connection. Since this is a digital bus
connection, it is not possible to measure the signals on the bus with a multimeter. Instead, the LMI
provides you with error codes that give you an indication of the bus state.
The error codes are one of the following:
E61
Error in the CAN bus data transfer for all CAN units
E62
Error in the can bus data transfer of the pressure transducer sensor unit
E63
Error in the can bus pressure transducer sensor unit
E64
Error in the can bus data transfer of the length/angle sensor unit
E65
Error in the can bus length/angle sensor unit
Block Diagram
The block diagram tries to clarify that: If the CU does not see any CAN-Bus component, it will report
an E61. If it sees only the cable reel, it will report an E62 (pressure transducer missing). If it sees only
the pressure transducer, it will report an E64 (cable reel missing). E63 means that the pressure
transducer is available, but is reporting an internal error. E65 means that the cable reel unit is
available, but is reporting an internal error.
So, what do you do when you are having a problem with one of those codes?
12.1 E61
In case of an E61, start by connecting the two cables on the transducer block together. If an E62
appears, the transducer block must be replaced. If an E61 appears, reconnect the cable from the
from the central unit to the transducer block. At this point, if an E61 still appears check your cabling.
You can verify that power is being supplied to the sensor by testing the CAN connectors per this
layout:
Connector
M12, 5 contacts
Pin Layout (CiA DR-303-1 7.2)
Pin 1 Shield
Pin 2 + U
b
Pin 3 Ground
Pin 4 CAN High
Pin 5 CAN Low
Pressure Transducer
E63
iFLEX5
CU
Cable Reel
CAN-Bus
Converter
E65
E64
E61
E62