ProSoft Technology MVI94-MCM-MHI - Manual (Page 23)

MVI94-MCM ♦ Flex I/O Platform Configuration
Serial Communications Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 23 of 109
March 29, 2011
3.3 [Modbus Master]
The [Modbus Master] section of the configuration file defines the command list
specifications for the master port. The following table describes the parameters
defined in this section:
[Modbus Master] Configuration header for Modbus Master.
Command Count: 0 to 100 This parameter specifies the number of
commands to be processed by the Modbus
Master port.
Minimum Command
Delay:
0 to 65535 This parameter specifies the number of
milliseconds to wait between issuing each
command. This delay value is not applied to
retries.
Command Error
Pointer:
-1 to 3995 This parameter sets the address in the internal
Modbus database where the command error data
is placed. If the value is set to -1, the data is not
transferred to the database.
Response Timeout: 0 to 65535 This parameter represents the message response
timeout period in 1 mSec 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.
Retry Count 0 to 10 This parameter specifies the number of times a
command will be retried if it fails.
Error Delay Count 0 to 65535 This parameter specifies the number of polls to
skip on the slave before trying to re-establish
communications. After the slave fails to respond,
the master will skip commands to be sent to the
slave the number of times entered in this
parameter.