Specifications; Devicenet Communications Specifications - Omron E5ZN-DRT Operation Manual

Specifications

1-2

Specifications

1-2-1

DeviceNet Communications Specifications

Item
Communications protocol
Communications Remote I/O com-
functions munications
Simple I/O alloca-
tion
I/O allocations
from the Configu-
rator
Message commu-
nications
Setting, monitoring
and controlling
operations from
the Configurator
Connection format
Baud rate
Communications media
Up to 63 slaves can be connected to a single master. Up to 16 Temperature
Controllers total for all blocks can be connected to a single DeviceNet Com-
munications Unit.
Terminating resistance of 100 to 125
ends of the RS-485 communications transmission path. For details on RS-485
communications with Temperature Controllers, refer to the E5ZN Temperature
Controller Operation Manual (H113).
Note Connect the DeviceNet Communications Unit to the E5ZN-SCT24S Terminal
Unit on the left end of any one of the blocks.
Conforms to DeviceNet
• Master-slave connections (polling, bit-strobe, COS, or cyclic)
• Conform to DeviceNet specifications.
• Allocates I/O data using switch settings only, without a Configurator.
• I/O is allocated for Temperature Controller statuses, process values, set points,
alarm output status, and other basic data only.
• One block for IN area, up to 46 words (words are allocated through the maxi-
mum number of units connected)
• One block for OUT area, up to 38 words (words are allocated through the max-
imum number of units connected)
• 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 (first two words are always
allocated to Output Enable Bits). (See note 2.)
• Explicit message communications
• CompoWay/F communications commands can be sent (commands are sent in
explicit message format).
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.
Combination of multidrop and T-branch connections (for trunk and drop lines)
DeviceNet: 500, 250, or 125 kbps, or automatic detection of master baud rate
RS-485: 38.4 kbps
Special 5-wire cable (2 signal lines, 2 power lines, and 1 shield line)
(1/2 W) must be connected to both
Specifications
Section 1-2
9