Serial Link Diagnostics And Monitoring - ABB RELION REC615 Operation Manual

Section 8
Commissioning
8.4.2.2
120
In addition to setting the COM parameter, a communication card with
many hardware options may also require changing the jumpers on the
communication card.
Connection of a serial communication protocol to a specific serial port
The serial communication protocol (instance) settings include a setting parameter
called Serial port n (n = protocol instance number). Setting options for this parameter
are "COM1", "COM2" and so on. The desired serial port for the protocol instance is
selected through this parameter.
All link setting parameters are not found in the COMn settings.
Additional link setting parameters are found in the setting parameter
list of the used serial protocol, since some serial protocol standards
allow changes in link parameters, while other protocol standards do
not.

Serial link diagnostics and monitoring

Serial communication diagnostics and monitoring is divided between the serial link
driver and the serial communication protocol. The lower level physical and protocol-
independent aspects of the UART-based serial communication are monitored in the
serial link driver. Diagnostic counters and monitoring values are found via the LHMI
in Monitoring/Communication/COMn (n= 1,2,...).
Depending on the communication protocol, the serial driver software receives single
characters or complete protocol frames, based on the frame start/stop characters or on
timing.
Monitoring data for a COM channel can be divided into basic and detailed diagnostic
counters.
Table 25: Monitoring data for a COM channel
Parameter Range
Characters 0...2147483646
received
Frames received 0...2147483646
Frames discarded 0...2147483646
Frames 0...2147483646
transmitted
CD Lost 0...2147483646
Collision 0...2147483646
CTS Timeout 0...2147483646
Table continues on next page
Type Description
Basic Number of separate characters received.
Basic Number of successfully received complete
frames.
Basic Number of frames discarded.
Basic Number of frames transmitted.
Detailed Number of carrier-detect signal lost during
receive.
Detailed Number of collisions detected.
Detailed Number of clear-to-send signal timeout
errors.
1MRS758754 B
REC615 and RER615
Operation Manual