ProSoft Technology MVI71-MNET - Manual (Page 31)

Module Configuration MVI71-MNET ♦ PLC Platform
User Manual Modbus TCP/IP Interface Module
ProSoft Technology, Inc.
Page 31 of 109
June 23, 2009
Float Start
0 to 65535
This parameter defines the first register of floating-point data. All requests with
register values greater-than or equal to this value will be considered floating-point
data requests. This parameter is only used if the Float Flag is enabled. For
example, if a value of 7000 is entered, all requests for registers 7000 and above
will be considered as floating-point data.
Float Offset
0 to 9999
This parameter defines the start register for floating-point data in the internal
database. This parameter is used only 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.
ARP Timeout
1 to 60
This parameter specifies the number of seconds to wait for an ARP reply after a
request is issued.
Command Error Delay
0 to 300
This parameter specifies the number of 100 millisecond intervals to turn off a
command in the error list after an error is recognized for the command. If this
parameter is set to 0, there will be no delay.
2.7.6 [MNET Client x Commands]
The [MNET Client x Commands] section of the configuration sets the Modbus
master port command list. This command list polls Modbus slave devices
attached to the Modbus master port. The module supports numerous commands.
This permits the module to interface with a wide variety of Modbus protocol
devices.
The function codes used for each command are those specified in the Modbus
protocol (page 88). Each command list record has the same format. The first part
of the record contains the information relating to the MVI71-MNET
communication module and the second part contains information required to
interface to the Modbus slave device.