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9
Specifications
Section 1-2
Terminating resistance of 100 to 125
Ω
(1/2 W) must be connected to both
ends of the RS-485 communications transmission path.
Note
Connect the DeviceNet Communications Unit to the Temperature Controllers
on the left end of any one of the blocks.
1-2
Specifications
1-2-1
DeviceNet Communications Specifications
Item
Specifications
Communications protocol
Conforms to DeviceNet
Communications
functions
Remote I/O com-
munications
• Master-slave connections (polling, COS, or cyclic)
• Conform to DeviceNet specifications.
Simple I/O alloca-
tion
• Allocates I/O data using switch settings only, without a Configurator.
• I/O is allocated for Temperature Controller status, process values, set points,
alarm output status, and other basic data only.
• One block for IN Area, up to 86 words (words are allocated through the unit
number set in the highest communications unit number setting)
• One block for OUT Area, up to 74 words (words are allocated through the unit
number set in the highest communications unit number setting)
I/O allocations
from the Configu-
rator
• Can be used to allocate any I/O data from the Configurator.
• Can be used to allocate any data, such as parameters specific to the
DeviceNet Communications Unit and the Temperature Controller variable area.
• Up to 2 blocks for the IN Area, up to a total of 100 words. (See note 1.)
• One block for OUT Area 1 block, up to 100 words (the first word is always allo-
cated to the OUT Enable Bit). (See note 2.)
Message commu-
nications
• Explicit message communications
• CompoWay/F communications commands can be sent (commands are sent in
explicit message format).
Setting, monitoring
and controlling
operations from
the Configurator
Supported by DeviceNet Configurator (using the Edit Parameters and Device
Monitor functions of the DeviceNet Communications Unit and Temperature Con-
trollers).
• Used to set and monitor the DeviceNet Communications Unit.
• Used to register connection configurations, make initial settings (see note 3),
change settings, and monitor the Temperature Controllers.
• Use to allocates data for master communications.
• Used to allocates word in the IN and OUT Areas for specific data.
• Used to sends operation commands to the Temperature Controllers.
Connection format
Combination of multidrop and T-branch connections (for trunk and drop lines)
Baud rate
DeviceNet: 500, 250, or 125 kbps, or automatic detection of master baud rate
Communications media
Special 5-wire cable (2 signal lines, 2 power lines, and 1 shield line)
Communications distance
Baud rate
Network length
Drop line length
Total drop line
length
500 kbps
100 m max.
(100 m max.)
6 m max.
39 m max.
250 kbps
250 m max.
(100 m max.)
6 m max.
78 m max.
125 kbps
500 m max.
(100 m max.)
6 m max.
156 m max.
The values in parentheses apply when Thin Cables are used.
Communications power supply
11 to 25 VDC
Maximum number of nodes that can be
connected
64 (includes Configurator when used.)
Maximum number of slaves that can be
connected
63
Summary of Contents for EJ1 - 07-2008
Page 3: ...iv...
Page 19: ...xx...
Page 33: ...14 Initial Temperature Controller Settings Section 1 4...
Page 53: ...34 Wiring the Temperature Controllers Section 3 4...
Page 101: ...82 Ladder Programming Examples Section 4 6...
Page 143: ...124 Sending Explicit Messages Section 6 5...
Page 155: ...136 Message Communications Characteristics Section 7 2...
Page 163: ...144 Maintenance Section 8 2...
Page 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Page 197: ...178 Index...