ProSoft Technology MVI71-MCM - Manual (Page 90)

MVI71-MCM ♦ PLC Platform Reference
Modbus Communication Module
Page 90 of 111 ProSoft Technology, Inc.
December 28, 2007
Write
Block
Offset Internal
Database
Register Content Description
30 5033 Retry
Count
This parameter specifies the number of times a command
will be retried if it fails. If the master port does not receive a
response after the last retry, the slave devices
communication will be suspended on the port for Error
Delay Counter scans.
31 5034 Error
Delay
Counter
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.
59 5068 Guard
Band
Timeout. A value of 0 uses the default baud rate or you can
set a timeout value in milliseconds (0 to 65535)
5.6.3 Port 2 Setup
Write
Block
Offset Internal
Database
Register Content Description
32 5040 Enable This parameter defines if this Modbus port will be used. If
the parameter is set to 0, the port is disabled. A value of 1
enables the port.
33 5041 Type This parameter specifies if the port will emulate a Modbus
master device (0), a Modbus slave device without pass-
through (1), or a Modbus slave device with unformatted
pass-through (2), or a Modbus slave device with formatted
pass-through and byte swapping (3).
34 5042 Float Flag This flag specifies if the floating-point data access
functionality is to be implemented. If the float flag is set to 1,
Modbus functions 3, 6, and 16 will interpret floating-point
values for registers as specified by the two following
parameters.
35 5043 Float Start 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.
36 5044 Float
Offset
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.
37 5045 Protocol This parameter specifies the Modbus protocol to be used on
the port. Valid protocols are: 0 = Modbus RTU and 1 =
Modbus ASCII.
38 5046 Baud Rate 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 entries are 110, 150, 300, 600, 1200, 2400,
4800, 9600, 19200, 28800, 384 (for 38400bps), 576 (for
57600bps), and 115 (for 115,200bps).
39 5047 Parity This is the parity code to be used for the port. Values are
None, Odd, Even.