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8M811K01 3BSE018173R1 processor module

This parameter defines the start register for floating point data in the internal database. This parameter is only used if the Float Flag is enabled. For example, if the Float Offset value is set to 3000 and the Float Start parameter is set to 7000, data requests for register 7000 will use the internal Modbus register 3000.This parameter specifies the Modbus protocol to be used on the port. Valid protocols are 0 = Modbus RTU and 1 = Modbus ASCII.

This is the baud rate to be used on the port. Enter the baud rate as a value. For example, to select 19K baud, enter 19200. Valid entry for this field include: 110, 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 28800, 38400, 57600, and 115.This parameter sets the number of milliseconds to delay after RTS is asserted before the data is transmitted.This parameter sets the number of milliseconds to delay after the last byte of data is sent before the RTS modem signal will be set low.

Serial Communications Modbus

This parameter specifies the minimum number of milliseconds to delay before responding to a request message. This pre-send delay is applied before the RTS on time. This may be required when communicating with slow devices.This parameter specifies if the CTS modem control line is to be used. If the parameter is set to No, the CTS line will not be monitored. If the parameter is set to Yes, the CTS line will be monitored and must be high before the module will send data. This parameter is normally only required when half-duplex modems are used for communication (2-wire).This parameter sets the address in the internal Modbus database where the command error data is placed. If the value is set to -1, the data is not transferred to the database.

[Modbus Master] 

The [Modbus Master] section of the configuration file defines the command list specifications for the master port. The following table describes the parameters defined in this section:This parameter specifies the number of times a command will be retried if it fails.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

This parameter defines the virtual Modbus slave address for the internal database. Any requests received by the port with this address will be processed by the module. Each device must have a unique address on a network.This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 4 commands. For example, if the value is set to 150, an address request of 0 will return the value at register 150 in the database.