Table 19: LED configuration (COM1004...COM1005)
LED Description
X1 X1 LANA
X2 X2 LANB
X6 X6 LD
X7 TX FO-UART
X8 TX RS-485/COM2
X8 TX RS-485/COM1
IRIG-B IRIG-B
7.4.2.5 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.
7.4.2.6 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 20: Setting parameters
Parameter Description
Fiber mode Defines the fiber-optic mode used. Setting "No fiber" is the
same as galvanic mode.
Serial mode Used for galvanic RS-485 modes 2- or 4-wire. This setting is
relevant only if Fiber mode is set to "No fiber".
Baudrate Communication speed used.
Table 21: Diagnostic counters and indications
Counters Description
Characters received Counts all incoming non-erroneous characters. This counter
operates regardless of whether the serial driver is set to de-
tect a whole protocol link frame or just separate characters.
Frames received Counts all protocol-specific non-erroneous frames received.
Protocol-specific frames can be based on timing (for exam-
Table continues on the next page
Commissioning 1MRS759118 D
122 REX640
Operation Manual
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