K3HB-X
6
DeviceNet Communications
■
Internal Block Diagram
Communications protocol
Conforms to DeviceNet
Supported communi-
cations
Remote I/O communications
Master-Slave connection (polling, bit-strobe, COS, cyclic)
Conforms to DeviceNet communications standards.
I/O allocations
Allocate any I/O data using the Configurator.
Allocate any data, such as DeviceNet-specific parameters and variable area for Digital
Indicators.
Input area: 2 blocks, 60 words max.
Output area: 1 block, 29 words max.
(The first word in the area is always allocated for the Output Execution Enabled Flags.)
Message communications
Explicit message communications
CompoWay/F communications commands can be executed (using explicit message
communications)
Connection methods
Combination of multi-drop and T-branch connections (for trunk and drop lines)
Baud rate
DeviceNet: 500, 250, or 125 Kbps (automatic follow-up)
Communications media
Special 5-wire cable (2 signal lines, 2 power supply lines, 1 shield line)
Communications distance
Baud rate
Network length
(max.)
Drop line length
(max.)
Total drop line
length (max.)
500 Kbps
100 m (100 m)
6 m
39 m
250 Kbps
100 m
(250 m)
6 m
78 m
125 Kbps
100 m
(500 m)
6 m
156 m
The values in parentheses are for Thick Cable.
Communications power supply
24-VDC DeviceNet power supply
Allowable voltage fluctuation range
11 to 25-VDC DeviceNet power supply
Current consumption
50 mA max. (24 VDC)
Maximum number of nodes
64 (DeviceNet Configurator is counted as one node when connected)
Maximum number of slaves
63
Error control checks
CRC errors
DeviceNet power supply
Supplied from DeviceNet communications connector
ADC
EEP-ROM
Analog inp
u
t
E
v
ent inp
u
t
De
v
ice
N
et
X
V
O
V
O
BCD I/O
Sensor po
w
er
s
u
pply
Keys
Micro-
comp
u
ter
W
a
v
eform
shaping circ
u
it
Dri
v
e
circ
u
it
Indications
Dri
v
e
circ
u
it
Digital inp
u
t
circ
u
it
Filter
Inp
u
t
circ
u
it
BCD
•
Inp
u
t circ
u
it
•
O
u
tp
u
t circ
u
it
•
Transistor
o
u
tp
u
t circ
u
it
Dri
v
e
circ
u
it
Dri
v
e
circ
u
it
Dri
v
e
circ
u
it
Dri
v
e
circ
u
it
Transistor
o
u
tp
u
t
Relay o
u
tp
u
t
Linear o
u
tp
u
t
Comm
u
nications
De
v
ice
N
et
circ
u
it
Comm
u
ni-
cations
dri
v
er
Po
w
er s
u
pply
Po
w
er s
u
pply circ
u
it (isolated)
V
DD
V
COM
DC-DC
Con
v
erter (isolated)
Linear o
u
tp
u
t
circ
u
it
