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ProSoft Technology MVI56-DFCMR User Manual

Page 39

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Ladder Logic

MVI56-DFCMR ♦ ControlLogix Platform

DF1 Interface Module with Reduced Data Block

ProSoft Technology, Inc.

Page 39 of 113

October 20, 2008

Enable

: This parameter defines if the command will be executed or will be

disregarded. The following values are valid: 0=Disables the command and it will
not execute. 1=The command will be considered for execution each scan of the
command list and will be controlled by the PollInt parameter. And 2=The
command will only execute if the data associated with the command has
changed since the command was last issued. This option is only available for
write commands.

IntAddress

: This parameter specifies the starting internal register address to be

associated with the command. Valid entry for this parameter is 0 to 4999.

PollInt

: This parameter defines the minimum number of seconds to wait between

the execution of continuous commands (Enable=1). This poll interval command
can be used to lighten the communications load on a busy network. Valid entry
for this parameter is 0 to 65535.

Count

: This parameter defines the number of registers to be considered by the

command. Valid entry for this parameter is 1 to 100.

Swap

: This parameter specifies if the data used in the command must be altered

when reading data from a node on the network. Values that can be assigned are
as follows: 0=no swapping of data, 1=swap word values, 2=swap word and byte
values and 3=swap byte values. This option is used when interfacing the module
with ASCII and floating-point data on other devices.

Node

: This parameter assigns the DF1 slave node address for the module to

reach with the command on the network. This parameter can be assigned values
from 0 to 255.

Func

: This parameter specifies the function to be performed by the command.

Valid entries are those defined in the DF1 Command Set for ProSoft
Technology. Communication Modules

found at the end of this manual.

Parameter_1 to Parameter_4

: These are the parameters required for the

selected function. Each command has its own unique set of one or more
parameters. Refer to the DF1 Command Set document for a complete list of
command parameters.

3.1.3 DF1 Port Parameters (DFCMPort)

Name Data

Type

Description

Enabled

INT

0=Port Disabled,1=Port Enabled

Type INT

0=Master,

1=Slave

StationID

INT

0-254 local station id for device emulated on this port

Protocol INT 0=Full-duplex,

1=half-duplex

TerminationType INT

0=BCC,

1=CRC

Baudrate

INT

Baudrate for port (110 to 115.2K)

Parity

INT

0=None, 1=Odd, 2=Even, 3=Mark, 4=Space

DataBits

INT

5 to 8 data bits

StopBits

INT

1 or 2 stop bits

MinResp

INT

0-65535 mSec minimum time before response to request