ProSoft Technology MVI56-MCM

MVI56-MCM ♦ ControlLogix Platform Reference
Modbus Communication Module
Page 116 of 159 ProSoft Technology, Inc.
July 24, 2008
Register Content Description
5054 Slave ID
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).
5055 Bit in Offset
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
register 150 in the database.
5056 Word in Offset
This parameter specifies the offset address in the
internal Modbus database that is to be used with
network request 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.
5057 Out in Offset
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 100,
an address request of 0 will correspond to register
100 in the database.
5058 Holding Reg Offset
This parameter specifies the offset address in the
internal Modbus database that is to be used with
network requests for Modbus function 3, 6, or 16
commands. For example, if a value of 50 is
entered, a request for address 0 will correspond to
the register 50 in the database.
5059 Command Count
This parameter specifies the number of commands
to be processed by the Modbus master port.
5060
Minimum Command
Delay
This parameter specifies the number of
milliseconds to wait between issuing each
command. This delay value is not applied to
retries.
5061 Command Error Pointer
This parameter sets the address in the internal
Modbus database where the command error will be
placed. If the value is set to -1, the data will not be
transferred to the database. The valid range of
values for this parameter is -1 to 4899.
5062 Response Timeout
This parameter represents the message response
timeout period in 1-millisecond increments. This is
the time that a port configured as a master will wait
before re-transmitting a command if no response is
received from the addressed slave. The value is
set depending upon the communication network
used and the expected response time of the
slowest device on the network.
5063 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.