default is 9600, most Modbus devices communicate at this speed as well. Multiple baud rates may be selected in this menu.
If multiple rates are selected, the Energy Monitoring Hub will automatically detect the baud rate of each Modbus device
from the chosen options. Once the baud rate has been detected for a specific Modbus device address, and will continue to
communicate with that specific device address at the detected speed. This feature will allow you to mix multiple devices on
the same RS485 loop with different baud rates. Modbus devices default to a baud rate of 9600. Note: Modbus device
manufacturers usually do not 'officially' support this configuration; however we have not seen any problems with this in any
of the Modbus devices we provide drivers for. Most Modbus devices simply ignore packets received at the wrong baud rate.
If you are experiencing Modbus communications problems, you should set the baud rate to a fixed 9600 before
troubleshooting.
Modbus RS/485 Parity:
This feature allows alternate parity options to be set. Default is no parity.
Modbus RS/485 Stopbit:
This feature allows alternate stop bit options to be set. Default is one stop bit.
Modbus RS/485 Timeout:
This feature sets the period of time the Energy Monitoring Hub will wait for a response from
any device on the Modbus RS485 serial loop. The default of 200ms is long enough for most Modbus devices. Longer
timeouts may be required if you have a very slow device, or if you have a Modbus repeater device in the serial loop.
Devices such as the ModHopper, the Veris H8936 Local Display, or any RS485 wireless link repeaters add a substantial
delay. Setting the delay longer than the default will increase the time required to auto-detect new Modbus devices when
attached to the Energy Monitoring Hub. For ModHopper connections, use a minimum setting of 1.5 seconds. The allowed
range is 100ms to 5 seconds.
Tip: Set the timeout to the longest available setting, and use the “stats” option on the bottom right of the device list page to
monitor the actual RTT (response time) for each device. Next, decrease the RS485 Timeout that is close to (but longer than)
the slowest device in the device list.
Modbus
RS/485 Debug:
This feature records Modbus RS485 transaction data in the system debug log file. You must
click the “start log” button on the system/log files page to record this information. Debug options are as follows:
None: No RS485 information is logged.
Errors: Only Modbus errors are logged.
Transaction: One line is logged describing every RS485 query, and the result of that query.
Full Debug: Complete listing of all queries including hex dumps of all data sent/received.
Search for Modbus/RS485 Devices:
This option allows the Energy Monitoring Hub to search for Modbus devices
attached on the RS/485 port. This feature may be disabled to reduce queries on the RS/485 port. Default is enabled.
Search for Sensor Network Devices
: This option will allow the Energy Monitoring Hub to search for sensor network
enabled ModHoppers (R9120-3SN) , and log data from attached devices. Note: this is for sensor network devices such as
PointSix and Badger receivers, and not Modbus or Pulse devices. Default is disabled.
Alarm Setup
The Modbus Alarms section provides the ability to send messages when alarm levels are exceeded. Messages can be sent
by email, snmp or displayed on the LCD console. Alarms are processed at the end of the data logging period. For more
frequent alarms, shorten the data log interval. Log readings and alarm processing can be set to as often as once per minute.
Display all alarms on LCD console
: When checked, all alarm messages are shown on the LCD display of the Energy
Monitoring Hub.
SNMP Trap Send Enabled
: When checked, SNMP Trap messages are sent after every log period for each data point that
is in an alarm state. The trap includes information about the Energy Monitoring Hub system data point, and alarm state. A
full MIB is located on the Energy Monitoring Hub; click the MIB link to the right of this option.
SNMP Trap Host 1 (2, 3):
When SNMP traps are enabled, a trap message is sent to each of the trap host addresses.
Specify the trap host by IP address, not DNS name.
Direct email on alarm:
When checked, the Energy Monitoring Hub will send an email message when any data point
changes its alarm state.
SMTP Mail Server Address
: The IP address of the email server on the LAN that will process and forward the email
message to the recipient.
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