5
Scanner SDK Functions
Section 1-4
Maximum Numbers of I/O Points and Slaves
The following table shows the max. number of I/O points, max. number of
Slaves, and max. number of I/O connections allowed by the Scanner SDK’s
Master function.
Note
Two input areas have been provided for each slave, but normally only the first
area is used. If two connections are used at the same time, then the second
input area can be used.
Slave Function
The Scanner SDK Slave function provides two 200-byte input areas (100
words or 1,600 bits) and one 200-byte of output area (100 words or 1,600
bits). The following methods can be used to register the Master in the slave
scan list.
1,2,3...
1.
Use functions to register Masters individually or in a group.
2.
Register Masters in a group by specifying a parameter file that was created
with the OMRON DeviceNet Configurator.
A slave scan list must be registered in the Scanner SDK for nodes to operate
as Slaves.
Maximum Numbers of I/O Points and Masters
The following table shows the max. number of I/O points and max. number of
Masters allowed by the Scanner SDK’s Slave function.
Note
Two input areas have been provided, but normally only the first area is used. If
two connections are used at the same time, then the second input area can
be used.
1-4-2
Message Communications Function
Explicit Message
Communications
The DeviceNet PCI Board supports explicit message communications.
As a client, the DeviceNet PCI Board can send explicit messages to control or
monitor other nodes in the DeviceNet network when necessary.
As a server, the DeviceNet PCI Board can receive explicit messages from
other nodes. (The requested processing and responses must be handled in
user applications.)
Explicit message communications can be used to freely communicate with
DeviceNet-compatible devices produced by other companies.
Item
Specification
Max. number of I/O
points
Input: 25,200 bytes (= 12,600 words or 201,600 points)
Output: 12,600 bytes (= 6,300 words or 100,800 points)
Max. number of I/O
points per Slave
Input: 200 bytes
×
2 (= 100 words
×
2 or 1,600 points
×
2)
Output: 200 bytes (= 100 words or 1,600 points)
Max. number of Slaves
63 Slaves (Node addresses 0 to 63 can be used.)
Max. number of I/O con-
nections per Slave
2 max.
Item
Specification
Max. number of I/O points Input: 200 bytes
×
2 (= 100 words
×
2 or 1,600 points
×
2)
Output: 200 bytes (= 100 words or 1,600 points)
Max. number of Masters
1 Master
Summary of Contents for DeviceNet 3G8F7-DRM21-E
Page 1: ...OPERATION MANUAL Cat No W381 E1 02 3G8F7 DRM21 E DeviceNet PCI Board ...
Page 2: ...3G8F7 DRM21 E DeviceNet PCI Board Operation Manual Revised July 2005 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 29: ...12 Preparation for Operation Section 1 8 ...
Page 67: ...50 PC Watchdog Timer Management Function Section 3 11 ...
Page 115: ...98 Maintenance API Functions Section 4 7 ...
Page 131: ...114 Remote I O Communications Characteristics Section 6 1 ...
Page 145: ...Index 128 ...
Page 147: ...130 Revision History ...
