ProSoft Technology MVI94-MCM-MHI - Manual (Page 24)

Configuration MVI94-MCM ♦ Flex I/O Platform
User Manual Serial Communications Modbus Communication Module
Page 24 of 109 ProSoft Technology, Inc.
March 29, 2011
3.4 [Modbus Slave]
The [Modbus Slave] section of the configuration file defines the slave address
and the data storage offsets for the slave port. The following table lists the
parameters defined in this section.
[Modbus Slave] Configuration header for Modbus Slave
Internal Slave ID 0 to 255 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.
Bit Input Offset 0 to 3995 This parameter specifies the offset address in the
internal Modbus database for 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 register 150 in the database.
Word Input Offset 0 to 3995 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.
Output Offset 0 to 3995 This parameter specifies the offset address in the
internal Modbus database for network requests for
Modbus function 1, 5, or 15 commands. For
example, if the value is set to 100, an address
request of 0 will return the value at register 100 in
the database.
Holding Register
Offset
0 to 3995 This parameter specifies the offset address in the
internal Modbus database for network requests for
Modbus functions 3, 6, or 16 commands. For
example, if the value is set to 50, and address
request of 0 will return the value at register 50 in
the database.
Use Guard Band
Timer
Y or N This parameter specifies if the packet Guard Band
is to be used. This is used for multi-drop only.
Guard Band
Timeout
0 to 65535 This parameter specifies the Guard Band time
between packets in multi-drop slave mode. A
value of 0 uses the default time. A value of 1 to
65535 sets the time in milliseconds.