Electrical Installation
‑157‑
The following table specifies the cable pin connections for the communication
between the AC drive and PLC in CAN communication networking.
Table 7–25 Cable pin connections for communication between PLC and the AC drive
AC Drive PLC
Communication
Type
Signal Description Communication
Type
Signal Description
CAN CANH CAN signal (+) CAN CANH CAN signal (+)
CANL CAN signal (‑) CANL CAN signal (‑)
CGND Signal reference
ground
CGND Signal reference
ground
‑ PE (shield) Enclosure ‑ PE (shield) Enclosure
CAN communication connection for multiple AC drives in parallel
The following table specifies the cable pin connections for multiple AC drives in
parallel in CAN communication networking.
Table 7–26 Cable pin connections for communication between multiple AC drives in parallel
AC Drive (Side A) AC Drive (Side B)
Communication
Type
Signal Description
Communication
Type
Signal Description
CAN
CANH
CAN signal (+)
CAN
CANH
CAN signal (+)
CANL
CAN signal (‑)
CANL
CAN signal (‑)
CGND
Signal reference
ground
CGND
Signal reference
ground
‑
PE (shield)
Enclosure ‑
PE (shield)
Enclosure
Communication networking
Use the daisy chain topology for the CAN bus. The following figure shows the CAN bus
topology. Use shielded twisted pair cables for the CAN bus and twisted pair cables for
CANH and CANL. Connect 120 Ω termination resistors only at both ends of the bus to
prevent signal reflection. Ensure that the CAN signal reference ground of all nodes are
connected together. A maximum of 64 nodes can be connected.
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