B&B Electronics MESP211D_T - Manual - Manual (Page 33)

Setup and Connections Vlinx MESP211 Modbus Gateway
32
Modbus Port Screen Advanced
Figure 33.
b. Attached – This is selectable between Master and Slaves. If Master is
selected, the Modbus Gateway will run in TCP server mode, if Slaves is
selected, it will run in TCP client mode.
c. Modbus – indicates the protocol of the device connected to the port. It can be
either RTU or ASCII.
d. Modbus Broadcast – Check this box to send Modbus broadcasts to a specific
serial port. Modbus broadcast is Slave ID 0h. If selected the Gateway will
send broadcast messages out the serial port and will not expect a response. If
unselected it will use slave ID 0h as a standard address.
e. Enable 0Bh Exception – Check this box to enable. When the Modbus slave
device does not respond before the timeout has been reached or has a bad
response (check sum does not match), the 0Bh exception code is transmitted
to the Master that initiated the Modbus message.
f. Enable Serial Message Buffering – If this option is selected, the gateway will
buffer up to 32 messages request per port. If this option is unselected, the
gateway will respond with a 06h if it has a message out on the port with no
response yet.
g. Modbus Serial Retries – Select 0 through 5. This sets the maximum number
of times that the Modbus Gateway will retry to send a Modbus message to a