User Manual
Table Of Contents
- Chapter One Introduction
- Chapter II Technical Specifications
- Chapter IV Panel Operation
- 4.1 Basic operation mode
- 4.2 dynamic test operation
- 4.3 input control
- 4.4 Electronic load operating range
- 4.5 protection function
- 4.6 remote test function
- 4.7 battery discharge test operation
- 4.8 Communication Protocol
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Figure 4-16 Battery capacity calculation diagram
4.8 Communication Protocol
4.8.1 Overview
PEL-8000 series of electronic load, support Modbus application protocol. The data frame structure contains
four parts:
Additional address
function code
data
Error checking
To ensure the reliability of communication, you should ensure that the data interval of each frame should be
greater than 3.5x single-byte transmission time. If the baud rate is 9600, the time interval between frames must be
greater than 11 * 3.5 / 9600 = 0.004 second.
Load using two-way asynchronous communication, a fixed start bit, 8 data bits, a stop bit. Support no parity,
odd parity, even parity three verification methods. Support 2400,9600,14400,28800,57600,115,200 total of 6 baud
rate options.
1) Additional address and communication parameter setting
The additional address is single-byte hexadecimal data, and the load only responds to the request data
frame whose additional address is the same as the local additional address.
2) Set the additional address
Press Shift + 0 to enter the main menu, the load will display "MENU CONFIG" and press Enter key to
confirm, then the load will enter the config configuration menu, press up and down key until the load shows
"CONFIG ADDRESS SET", prompt for additional address setting, press Enter Enter, then the load display
"ADDRESS ADDR = xxx", prompt the current additional address, if the user needs to modify this address, press
the number keys to edit, and press Enter to confirm. Please note that this address should be an integer
between 1 and 200.