ABB RELION 620 Series Operation Manual page 133

1MAC456939-IB D
620 series ANSI
Operation Manual
Table 25: Basic diagnostic counters
Counter
Characters received
Frames received
Frames discarded
Frames transmitted
Table 26: Detailed error counters
Counter
CD Lost
Collision
CTS Timeout.
Transmission timeout.
Parity errors
Overrun errors
Framing errors
Commissioning
Function
Counts all incoming non-erroneous characters. This
counter operates regardless of if the serial driver is
set to detect a whole protocol link frame or just
separate characters.
Counts all protocol specific non-erroneous frames
received. Protocol-specific frames can be based on
timing (for example, Modbus RTU) or on special start
and stop characters (for example, Modbus ASCII).
Counts all protocol-specific erroneous frames
received. If the driver detects an error while receiving
a frame, the frame is automatically discarded. This
also means that the protocol in question will never
receive a faulty frame from the driver. When this
counter is increased, one of the detailed error
counters is also incremented.
Counts all protocol-specific frames transmitted from
the COM channel.
Function
In RS-232 handshake mode, characters are to be
received as long as Carrier Detect (CD) signal is
active. This counter is incremented if the CD signal is
lost during reception.
Counts transmission collisions. Used in RS-485
mode by some protocols where transmissions could
collide. For example, DNP3 unsolicited mode.
In RS-232 handshake mode the Clear To Send
(CTS) signal is not received as reply to this device
Request To Send (RTS) signal.
In RS-232 handshake mode. If the CTS signal goes
inactive during transmission then the transmission is
halted. Transmission will be resumed when CTS
goes active again. The whole frame transmission
must anyhow be ready within a specified time. If this
timeout elapses then this counter is incremented.
Result will be that the end of the frame is not being
transmitted out.
Counts parity errors detected in characters.
Counts overrun errors detected in characters.
Counts framing errors detected in characters
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