Chapter 11 DeviceNet Master Scanner Module AS01DNET-A
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Program Explanation:
1. When M0 changes to ON, the value 16#5555 is written to D26105~D26108 in AS PLC. The data are
transmitted to the slave cyclically via DeviceNet Bus.
2. The contents in D26005~D26008 are the data which the master receives from the slave via DeviceNet
Bus. When M1 changes to ON, the data in D26005~D26008 are moved to D0, D1, D2 and D3.
11.4.8 Sending Explicit Message through Ladder Diagram
AS01DNET-A supports the sending of explicit messages via DNETRW instruction.
11.4.8.1. Principle of Explicit Message Transmission
1. AS PLC transmits the explicit request message to AS01DNET-A master according to the user program.
2. AS01DNET-A transmits the explicit request message to the slave according to the user program.
3. The slave sends back the response message to AS01DNET-A master after handling data.
4. AS PLC gets back the response message from AS01DNET-A master. Then the explicit message transmission of this
time is finished.
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