A8814 Acq
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connected device. See the section on manually adding a device below.
Troubleshoot: The AcquiSuite will review the devices connected and offer suggestions about any problems
found.
Rename all devices: This option allows you to edit all the device names in one configuration page. This is useful
when initially configuring a large number of new devices. A name must be assigned to a device before the
AcquiSuite will log data for it.
List all supported devices: This option will show a list of all Modbus devices with built in drivers in the installed
firmware.
Show [setup]: Display links for Device configuration and Advanced configuration for each device.
Show [devinfo]: Display the communications options including baud rate, serial number and firmware version
(when available) for all devices in the Modbus device list.
Show [stats]: show packet counters for all devices in the device list. These include
Sent: Total number of packets sent to this Modbus address.
Received: Total number of valid packets received from this Modbus address.
Error: Total number of packets received that fail CRC for this device. (does not include non-response
queries)
RTT: The average round trip time for the last 7-10 packets that received a valid response. This value
is useful in configuring the Modbus timeout in the ModbusSetup/RS485 page. Note: if the timeout
is set too short, you will not see an accurate value because packets dropped for timeout are not
counted for RTT.
XML: Display the device list data in XML format.
Notes on RTT and Timeout configuration:
To best measure the true RTT, set the ModbusSetup/RS485 timeout to the maximum period and allow the
AcquiSuite to run for 5 or 10 minutes. Next, review the RTT values seen in the device list page and make note of
the longest RTT time shown for any device. Last, configure the ModbusSetup/RS485 timeout to the option that is
the next largest than the longest time seen for any device. For example; if the worst RTT is 600ms, set the
timeout to 1second.
Typical RTT values for direct connected devices should range between 40ms and 200ms. Systems that have
wireless links such as ModHoppers should expect an additional delay of 500ms per hop. A complex system with
multiple ModHoppers may have RTT values upwards of 3 seconds.
Device Details
The device detail page will show a list of all the meter data points, alarm settings and console options. The data
point names for most devices are automatically entered. Some devices such as the A8923-4 io module have
generic inputs, and will be labeled as “pulse input #1”. At the top of the page, the status of the device is shown.
This usually reports “ok” however it can include error information if the device is not responding properly. A list
of device errors is available in the log file details section of this manual. At the bottom of the page, several
buttons are present.
Done: returns you to the device list page.
Log File: This icon will display a table view of the most recent data in the current log file. Use the log file export
page for complete log data access.
XML: This icon will show the current data from the Modbus device in an XML format. The URL from this icon
