Assigning Of A Serial Communication Protocol To A Com Serial Port; Serial Link Diagnostics And Monitoring - ABB RELION REX640 Operation Manual

Section 7
Commissioning
7.4.2.5
7.4.2.6
108

Assigning of a serial communication protocol to a COM serial port

The settings of the serial communication protocol instance include a setting
parameter, called either Port or Serial port, which is used to select the COM1 or
COM2 setting.
Since not all serial protocol standards allow changes in link
parameters, 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.

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 located on the HMI
under 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
link frame timing.
Table 19: Setting parameters
Parameter
Fiber mode
Serial mode
Baudrate
Description
Defines the fiber-optic mode used. Setting "No
fiber" is the same as galvanic mode.
Used for galvanic RS-485 modes 2- or 4-wire. This
Fiber mode is set to "No
setting is relevant only if
fiber".
Communication speed used
1MRS759118 A
REX640
Operation Manual