Creating An Ideal Communications Transaction; T0: Host Transmits Message Packet; T1: Unit Verifies Host Transmission Packet; Ae Bus Communications Transaction - Advanced Energy Pinnacle User Manual

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Advanced Energy

Creating an Ideal Communications Transaction

Figure 4-17 illustrates the steps in an ideal communications transaction between a host
computer and the Pinnacle.
Host
Figure 4-17. AE Bus communications transaction
T : HOST TRANSMITS MESSAGE PACKET
0
The host computer sends a message packet to the Pinnacle. The packet contains one of
the following:
• A command that requests data or status information
• A command and data that change a parameter setting
• An executable command
T : UNIT VERIFIES HOST TRANSMISSION PACKET
1
Once the Pinnacle receives the host computer transmission message packet, the
Pinnacle verifies that the message is intended for it and not for another unit on the
network. At this time, the Pinnacle also analyzes the checksum to verify that the
message was received correctly.
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Pinnacle
I/O Communication and Control 5702156-E