Omron DeviceNet 3G8F7-DRM21-E, Руководство по эксплуатации

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4
Scanner SDK Functions
Section 1-4
Use Other Vendor’s DeviceNet-compatible Devices
DeviceNet is a worldwide standard, so any manufacturer’s Slave can be con-
nected as long as it is DeviceNet compatible.
I/O Capacity of 37,800 Bytes for Up To 63 Slaves
The Scanner SDK provides 37,800 bytes for I/O allocation to up to 63 Slaves
(input: 25,200 bytes; output: 12,600 bytes).
Use API Functions to Control Devices
All Scanner SDK functions are provided as API functions. User applications
are created using the API functions.
Check Events with Windows Messaging or Polling
Events can be checked in two ways: automatic notification by Windows mes-
saging and monitoring (polling) of the Board’s event queue by user applica-
tions. Use the method most appropriate for each application.
1-4 Scanner SDK Functions
1-4-1 I/O Communications
Master Function The Scanner SDK Master function provides two 200-byte input areas (100
words or 1,600 points) and one 200-byte output area (100 words or 1,600
points) for allocation to each slave.
I/O communications are executed according to the scan list registered by the
Scanner SDK. Scan lists record information such as the number of input and
output bytes for each slave.
Computer
T-branch Tap
Output Slave
Solenoid
Relay
Input Slave
Sensor
Switch
One-cable, reduced
wiring
Max. network length
of 500 m
DeviceNet
communications
cable
Connect up to 63 DeviceNet
Slaves.
T-branching and multi-
drop wiring can be
combined freely.
Other company's Slaves
can be connected.
Application program
API functions
PCI Board