A-B 321131-A01 337672-A01 inverter motherboard

This parameter sets the command response timeout period in 1 millisecond increments. This is the time that a port configured as a Master will wait for a response from the addressed slave before re-transmitting the command (Retries) or skipping to the next command in the Command List. The value to set depends on the communication network used and the expected response time (plus a little extra) of the slowest device on the network.This parameter specifies the number of polls to skip on the slave before trying to re-establish communications. After the slave fails to respond, the Master will skip commands to be sent to the slave the number of times entered in this parameter.

[Modbus Port x Commands]

 The [Modbus Port x Commands] section of the configuration file defines the command list specifications for the Master port. The information in this section applies to both Port 1 and Port 2.

Write commands have a special feature, as they can be set to execute only if the data in the write command changes, which can improve network performance. If the register data values in the command have not changed since the command was last issued, the command will not be executed. To enable this feature, set the enable code for the command to a value of 2.

Command List Overview

 In order to interface the MVI69-MCM module with MODBUS slave devices, you must construct a command list. The commands in the list specify the slave device to be addressed, the function to be performed (read or write), the data area in the device to interface with and the registers in the internal database to be associated with the device data. The Master command list supports up to 100 commands. The command list is processed from top (command #0) to bottom. A poll interval parameter is associated with each command to specify a minimum delay time in number of seconds between the issuance of a command. If the user specifies a value of 10 for the parameter, the command will be executed no more frequently than every 10 seconds.

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