Belkin PureAV Hybrid AVU1500 UPS
Using Your AVU1500 with a
Home Automation System (optional)
The AVU1500 can be interfaced to a computer or Home Automation System with an available USB port or RS232 serial port. This document describes how to use these interfaces to communicate with the AVU1500.
USB Report Descriptor Protocol (adapted to the RS232 interface)
In general, the communication protocol is based on the USB HID Interface for Power Devices. If you are using a USB interface, you should be familiar with the USB HID specification and the HID Power Device Usage tables.
These are available from: http://www.usb.org/developers/hidpage.
The HID communication protocol has been adapted to the RS232 interface as described in the next section.
This UPS Report Descriptor includes six items:
a.Power Configuration Controls
b.Power Controls
c.Power Generic Status
d.Power Device Identification
e.Power Measures
f.Battery System
Each Item corresponds with a Report ID, and each Report ID field is predefined (Order, Byte #, Unit in each Report ID).
Serial Report Descriptor Protocol
RS232 Configuration:
• | Baud: | 2400 |
• | Data: | 8 bits |
• | Parity: | None |
• | Start Bit: | 1 |
Message Format (Binary):
Header |
| Type |
| Length | Report ID |
| Data | Check Sum |
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1 byte |
| 1 byte |
| 1byte | 1 byte |
| 64 bytes max | 1 byte |
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Header |
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The header will be a ‘~’ character, 0x7E in hex. |
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Type |
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0x01 - | Command rejected |
| (UPS ¬ Computer) | |||||
0x02 - | Command accepted |
| (UPS ¬ Computer) | |||||
0x03 - | Polling command |
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| (Computer ¬ UPS) | ||||
0x04 - | Set command |
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| (Computer ¬ UPS) | ||||
0x05 - | Data returned |
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| (UPS ¬ Computer) | ||||
0x06 - | Notification |
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| (UPS ¬ Computer) | ||||
Length
The length is the number of bytes from “Report ID” to “Data” items.
53
