ProSoft Technology 5202-DFNT-MCM4 - Manual (Page 25)

MCM Protocol Configuration MCM ♦ ProLinx Gateway
Driver Manual Modbus Master/Slave
ProSoft Technology, Inc.
Page 25 of 80
October 16, 2009
3.1.24 Guard Band Timeout
0 TO 65535
A value of 1 to 65535 sets the time in milliseconds. When this period has elapsed
and no further data is received, the gateway will handle the last received data
sequence as a Modbus message to be processed.
This parameter specifies the Guard Band Timeout between packets in multi-drop
slave mode. A value of 0 uses the default time, which is roughly equivalent to the
time it would take to send 3.5 bytes at the selected baud rate. This is the delay
value specified by the Modbus RTU protocol specifications.The following Guard
Band Timeout values will be automatically used by the gateway when Use Guard
Band is set to Y
ES and the Guard Band Timeout is set to the default value of zero
(0).
Baud Guard Band Timer (ms)
110 350
150 256
300 128
600 64
1200 32
2400 16
4800 8
9600 4
19200 2
28800 2
38400 2
57600 1
115200 1
3.1.25 Minimum Command Delay
0 TO 65535
This parameter specifies the number of milliseconds to wait between receiving
the end of a slave's response to the most recently transmitted command and the
issuance of the next command. This parameter can be used to place a delay
after each command to avoid sending commands on the network faster than the
slaves can be ready to receive them. This parameter does not affect retries of a
command, as retries will be issued when a command failure is recognized.