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7
4.3 Detailed CAN data frames description
Log-on and Log-off Front-end (FE) device
(active/write access)
Log-on
frame 8-channel
module
(DLC = 3)
Byte
DATA_ID
DATA_1
DATA_0
Bit
7
6
5
4
3
2
1
0
7
5
4
3
2
1
0
7
1
0
Designation
DATA
_DIR
G1 G0
Data
1
1
1
0
1
1
0
0
0
u
v
w
x
y
z
1
0
Description
active
G1 to G0: Group 0 to 3
Only needed if group
controller (GC) is used
Values of bit z to u:
see
Group access:
General status module
Type HIGH resolution
After POWER ON the module will give this group access cyclically on the bus (ca. 2...10 sec).
Bit 0 to 5 in DATA_1 describes the general status of the module (see
Group access: General status
module)
. If a controller identifies this access then it is able to register this module as a Front-end device and is
able to address it with FE_ADR.
(Module address, see also item 4.4, description 11bit-Identifier)
Bit 0 to 1 in DATA_0 describes the type of installed resolution of current and voltage measurement and setting
(see according
Single and
Group accesses
).
Remote-frame
Log-on controller
(DLC = 2)
Byte
DATA_ID
DATA_0
Bit
7
6
5
4
3
2
1
0
0
Designation
DATA_DIR
G1 G0
Data
0
1
1
0
1
1
0
0
0
1
Description
write
G1 to G0: Group 0 to 3
Only needed if group
controller (GC) is used
Module is
log-on
The module will not send further ‘Log-on controller” accesses after the successful registration as long as it
receives accesses from the external CAN Bus in periods shorter than one minute and until the controller will
send a ‘Log-off controller” access to the Front-end device, respectively.
Remote-frame
Log-off controller
(DLC = 2)
Byte
DATA_ID
DATA_0
Bit
7
6
5
4
3
2
1
0
0
Designation
DATA_DIR
G1 G0
Data
0
1
1
0
1
1
0
0
0
0
Description
write
G1 to G0: Group 0 to 3
Only needed if group
controller (GC) is used
Module is
log-off
