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 AcquiSuite 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 AcquiSuite.
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 AcquiSuite 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 AcquiSuite 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 AcquiSuite.
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 AcquiSuite system data point, and alarm state. A full MIB is
located on the AcquiSuite, 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 AcquiSuite 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.
Sender Address:
The address that will be used in the “From:” line of the email. This is helpful in identifying the source of
the alarm email message. If your SMTP mail server has junk filtering, you may be required to use a sender address that
matches a mailbox address on the SMTP mail server; check with your mail server administrator for specific details on this
issue.
Recipient address 1 (2,3):
The AcquiSuite can send a copy of the alarm notice to multiple email addresses. Specify one,
Page 17
A8810 AcquiSuite – Data Acquisition Server
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