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Replies
A counter that is incremented each time a reply message is sent back to the master.
This includes exception replies.
CRC errors
A counter that increments each time a message is received that has a CRC that does
not match what is calculated. Typically the result of wiring issues. Messages with CRC
errors are discarded and not replied to.
Invalid frames
A counter that increments each time a malformed Modbus frame is detected.
Malformed frames are for example messages larger than the allowed maximum PDU
size defined in the Modbus standards. This can be caused by non-Modbus traffic on
the network.
Rx time-outs (Modbus serial line)
A counter that increments each time an inter-character time-out occurred during the
reception of an inbound message.
Rx time-outs (Modbus/TCP)
A counter that increments if the master connection has timed out. Subsequently the
connection is terminated by the MBDC-200. A time-out occurs if no Modbus request
is received from a connected client within a 10 second period.
Tx time-outs
Number time-outs occurred when attempting to send a reply message.
The cumulative diagnostic data is reset when the device is power cycled or reset. The
data is also reset by pressing the Clear Counter button.
Finding the firmware version and serial number
Click on the About menu entry on the menu bar to show the product information as
shown below:
Figure 5.4: About page
This product information is important for service and support inquiries. The following
product information is provided:
Product name
The name of the product.
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UMMBDC200-2201
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