Westermo FD-80 - Manual (Page 17)

17 6630-2281
7.1.1.1 Expert configuration
Serial transfer > Expert parameters
Serial interface
Select the desired parameters of the internal interface of
Profibus DP Slave control. Set to 38,400 bit/s 8 data bits,
no parity and 1 stop bit, and will not be changed.
Delay to send first byte Set the delay time before switching from send to receive
frame or vice versa. Default is 0. Used when the line
requires a turning time.
Max time between bytes Set the maximum allowed time between bytes in a frame.
Default is 100. Useful when a frame will be divided by
transferring units which can cause a gap in parts of the
frame. Shall be less than “Min random delay at initiation”.
Min/max random delay Create a random delay until sending the initial frame in
at initiation point to point mode, to avoid collisions after start up and
disturbed communication.
Default is min 200 and max 500.
Fixed frame length Fixed 25 byte frame length. Should not be used.
20 data bytes Only when used together with old system.
Fixed frame length Fixed 37 byte frame length. Should not be used.
32 data bytes Only when used together with old system.
Variable frame length Should be selected for all Westermo Fieldbus Adapters.
1..126 data bytes
Profibus-DP > Expert parameters
Modem retries until set
The number of consecutive sent initial frames
Stat Diag before setting of the Profibus DP diagnostic information
Stat_Diag (static diagnostics). Default is 3. Can be
increased if transmission line is disturbed and that is
acceptable.
ID number Show the ID number of the FD-80. Can’t be changed.
CPU type Hardware information. For service purpose only.
Can’t be changed.
7.1.2 Profibus DP I/O data
Ordinary Profibus DP input and output data is used by FD-80 (P).