ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 36)

Configuration as a Modbus Master MVI56E-MCM ♦ ControlLogix Platform
User Manual Modbus Communication Module
Page 36 of 199 ProSoft Technology, Inc.
June 18, 2014
Parameter Description
Enabled 1 = ENABLE PORT , 0 = DISABLE PORT
Type 0=M ASTER , 1=S LAVE , 2=S LAVE WITH U NFORMATTED P ASS - THROUGH ,
3=S LAVE , FORMATTED P ASS - THROUGH WITH DATA SWAPPING , 4= S LAVE ,
FORMATTED PASS - THROUGH WITH NO DATA SWAPPING .
Protocol 0 = M ODBUS RTU MODE , 1 = M ODBUS ASCII MODE
Baudrate Sets the baud rate for the port. Valid values for this field are 110, 150,
300, 600, 1200, 2400, 4800, 9600, 19200, 384 or 3840 (for 38,400
baud), 576 or 5760 (for 57,600 baud) and 115,1152, or 11520 (for
115,200 baud)
Parity 0 = None, 1 = Odd, 2 = Even
DataBits Modbus RTU mode = 8 Modbus ASCII mode = 8 or 7
StopBits Valid values are 1 or 2.
RTS On 0 to 65535 milliseconds to delay after RTS line is asserted on the port
before data message transmission begins. This delay can be used to
allow for radio keying or modem dialing before data transmission
begins.
RTS Off 0 to 65535 milliseconds to delay after data message is complete
before RTS line is dropped on the port.
Use CTS Line No or Yes
This parameter is used to enable or disable hardware handshaking.
The default setting is No hardware handshaking, CTS Line not used.
Set to No if the connected devices do not need hardware
handshaking. Set to Yes if the device(s) connected to the port require
hardware handshaking (most modern devices do not) If you set this
parameter to Yes, be sure to pay attention to the pinout and wiring
requirements to be sure the hardware handshaking signal lines are
properly connected; otherwise communication will fail.
CmdCount 0-325 commands
This parameter sets the number of commands to execute from the
command list. Setting to zero (0) will disable all command polling.
Setting to a value less than the number of configured commands will
limit polling to the number of commands specified by this parameter.
Setting to a value greater than the number of configured commands
will cause invalid command errors to be reported for the unconfigured
commands.
Minimum Command Delay 0-65535 milliseconds
The amount of delay in milliseconds to be inserted after receiving a
Slave response or encountering a response timeout before retrying
the command or sending the next command on the list. Use this
parameter to slow down overall polling speed and spread out
commands on networks with Slaves that require additional gaps
between messages.
CmdErrPtr Internal DB location to place command error list
Each command will reserve one word for the command error code for
that command. See Verify Communication (page 66). C
MD E RR P TR
value should be within the range of the R EAD D ATA array. See
Backplane Configuration (page 103).