Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 50

Serial Port Configuration Page
Rx Timeout Between
Packets (ms) (Default
= 200)
Discard Rx Packets
With Errors (Default
= On)
Modbus Settings
Serial Port Protocol
(Default = Modbus/
RTU-to-Slaves)
Response Timeout
(Default = 750msec)
Lost Device Search
Enable
Not supported: 1-port
(Default = Off)
Inactivity Wait Time
Before Tx (ms)
(Default = 0 ms)
Send Write Messages
First (Default = Off)
Disable Writes (Read
Only) (Default = Off)
Device ID Offset
Mode (Default = Off)
50 - Chapter 4. Serial Menus
Serial Configuration Page (Continued)
Receive time-out (0-65535) between packets in msec. This is the maximum spacing
between received bytes allowed before the received Modbus serial message is
expected to be complete.
On or Off: If selected, the DeviceMaster EIP-MOD drops all packets received with
parity, framing, or overrun errors.
Note: Modbus/RTU messages with invalid CRCs and Modbus/ASCII messages
without correct start and end of transmission characters are always
discarded independent of this setting.
The Modbus protocol, setting for this serial port:
Modbus/RTU-to-Slaves – Configures the serial port to communicate to Modbus/
•
RTU slaves.
Modbus/ASCII-to-Slaves – Configures the serial port to communicate to
•
Modbus/ASCII slaves.
Modbus/RTU-to-Master – Configures the serial port to communicate to a
•
Modbus/RTU master.
Modbus/ASCII-to-Master – Configures the serial port to communicate to a
•
Modbus/ASCII master.
Modbus/RTU-to-Master/Slaves – Configures the serial port to communicate to a
•
serial bus with a Modbus/RTU master and Modbus/RTU slave(s).
Modbus/ASCII-to-Master/Slaves – Configures the serial port to communicate to
•
a serial bus with a Modbus/ASCII master and Modbus/ASCII slaves.
Modbus To-Slaves Settings
The maximum allowable time (0 to 65535 msec.) for a slave device to respond to a
message before the message is considered timed out.
If selected, lost devices that were on this port are searched for on other Modbus/
RTU and Modbus/ASCII slave ports that also have this option set.
The minimum time (0 to 65535 msec.) that the DeviceMaster EIP-MOD waits after
receiving a response or transmitting a Modbus request before transmitting the
next request.
If selected, it transmits any write messages before transmitting any read
messages that may have already been queued for transmission.
If selected, it disables transmission of all standard Modbus write messages.
Off disables Device ID Offset functionality.
•
Add-to-Msg-ID adds the Device Offset to the message device ID.
•
Subtract-from-Msg-ID subtracts the Device ID Offset from the message device
•
ID.
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A