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CAN interface communications
Reference information
114
Direction bit (1)
The Direction bit lets the devices on the bus know whether the current
message is to or from the master. “0” means that the message is from
master to slave; “1” means the message is from the slave to the master.
Note:
Peer-to-peer messaging is not supported.
Group bits (3)
The three group bits specify the group number (0-7). Each device on the
CAN bus has a group assignment. The pump is assigned to group 2
(010). Group 1 is reserved for the boot request procedure.
Device address bits (4)
The device address bits specify the address of the pump in the indicated
group. There can be up to 16 devices in the group, with addresses from 0
to 15. Expressed in binary, these would be b0000 through b1111. In hexa-
decimal, they would be 0h through 0Fh.
CAN arbitration field
CAN control field
CAN
data
block
MID
RTR
IDE
r0
Data
Length
(DLC)
Direction
Group
Device
Frame
X
010
XXXX
XXX
0
0
0
XXXX
0-8
Bytes
CAN arbitration field
CAN control field
CAN
data
block
MID
RTR
IDE
r0
Data
Length
(DLC)
Direction
Group
Device
Frame
X
010
XXXX
XXX
0
0
0
XXXX
0-8
Bytes
CAN arbitration field
CAN control field
CAN
data
block
MID
RTR
IDE
r0
Data
Length
(DLC)
Direction
Group
Device
Frame
X
010
XXXX
XXX
0
0
0
XXXX
0-8
bytes
Summary of Contents for C24000
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