Operating instructions

PTQ-MCM ♦ Quantum / Unity Platform Modifying the Configuration File

Modbus Communication Module

Page 68 of 139 ProSoft Technology, Inc.

April 29, 2008

Use CTS Line

Use CTS Line : No #Monitor CTS modem line (Y/N)

This parameter specifies if the CTS modem control line is to be used. If the

parameter is set to 0, the CTS line will not be monitored. If the parameter is set to

1, 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).

Slave Address

Slave Address : 0 #0-255 Slave Node Address

This parameter defines the virtual Modbus slave address for the internal

database. All requests received by the port with this address are processed by

the module. Verify that each device has a unique address on a network. Valid

range for this parameter is 1 to 255 (247 on some networks). The address 0 is

used for broadcast operations. When the slave port is configured without address

0 it will process all write commands received from the master but it will not send

a message response.

Bit Input Offset

Bit Input Offset : 0 #Internal DB offset to bit input data (Slave)

This parameter specifies the offset address in the internal Modbus database that

is to be used with network requests for Modbus Function 2 commands. For

example, if the value is set to 150, an address request of 0 will return the value at

Word Input Offset

Word Input Offset : 0 #Internal DB offset to word input data (Slave)

This parameter specifies the offset address in the internal Modbus database that

is to be used with 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

Output Offset

Output Offset : 0 #Internal DB offset to bit output data (Slave)

This parameter specifies the offset address in the internal Modbus database that

is to be used with network requests for Modbus function 1, 5, or 15 commands.

For example, if the value is set to 50, an address request of 0 will correspond to