ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 147)

MVI56E-MCM ♦ ControlLogix Platform Reference
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 147 of 199
June 18, 2014
Register Content Description
10,030 Minimum Command
Delay This parameter specifies the number of
milliseconds to wait between issuing each
command. This delay value is not applied to
retries.
10,031 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 9675.
10,032 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.
10,033 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.
10,034 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.
10,035 to 10,039 Spare Reserved for future use.
6.5.3 Port 2 Setup
Register Content Description
10,040 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.
10,041 Type This parameter specifies if the port will emulate a
Modbus Master device (0), a Modbus Slave device
without pass-through (1), a Modbus Slave device
with unformatted pass-through (2), a Modbus Slave
device with formatted pass-through and data
swapping (3), or a Modbus Slave device with
formatted pass-through and no data swapping (4).