ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 37)

MVI56E-MCM ♦ ControlLogix Platform Configuration as a Modbus Master
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 37 of 199
June 18, 2014
Parameter Description
Error Delay Counter This parameter specifies the number of poll attempts to be skipped
before trying to re-establish communications with a slave that has
failed to respond to a command within the time limit set by the
Response Timeout parameter. After the slave fails to respond, the
master will skip sending commands that should have been sent to the
slave until the number of skipped commands matches the value
entered in this parameter. This creates a sort of slow poll mode for
slaves that are experiencing communication problems.
RespTO 0 to 65535 milliseconds response timeout for command before it will
either reissue the command, if R
ETRY C OUNT > 0.
If the RetryCount =0 or if the designated number of retries have been
accomplished, then the Master will move on to the next command in
the list.
RetryCount Number of times to retry a failed command request before moving to
the next command on the list.
Note: To use up to 325 commands, your MVI56E-MCM module needs to have firmware version
3.01 or higher, and your MVI56E-MCM Add-On Instruction needs to be version 2.8 or higher.
Earlier versions support up to 100 commands.
2.2.2 Master Command Configuration
This topic describes the communications with the Master Port and the Slave
devices that are connected to that port.
Verify you are in M ONITOR T AGS mode. Then use the scroll bar at the bottom of
the window to view a description of each parameter.