User Manual
Universal Serial/PROFIBUS DP Gateway
GT200-DP-RS
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Scan rate
: Ratio of slow scan and fast scan. If the fast scan command sends 10 times, slow scan command sends
1 time.
Status of Modbus Command Response
: disable, 1byte, 2bytes, 3bytes, 4bytes, 5bytes, 6bytes, 7bytes, 8bytes,
9bytes, 10bytes, 11bytes, 12bytes and 13bytes can be selected. They are located in the first several bytes of
PROFIBUS input data and show the status of the Modbus commands. The bit 0 of the first byte shows the status
of the first Modbus command. Six bytes can show the status of all 48 commands. The value of the status is 0,
when the communication is OK and the value is 1.
Communication interface:
There are RS-232 and RS-485 to be selected. (Note: When using the RS-422, select
RS-485)
Time interval between Characters (Sending)
: The serial port of the GT200-DP-RS will send every byte
according to the time interval. The range of the value is 0 to 600, and the unit is 0.1ms. If the value is 100, then
the time interval is 100* 0.1 ms =10ms. (Note: The time interval does not contain/cover the frame interval of the
Modbus protocol)
Time interval between Characters (Receiving)
: The serial port of the GT200-DP-RS will use this time interval
to judge the receiving end basis. The range of the value is 0 to 600, and the unit is 0.1ms. If the value is 100, then
the time interval is 100* 0.1 ms =10ms. (Note: The time interval does not contain/cover the frame interval of
Modbus protocol)
Note: The reference time of the gateway receiving data and breaking frame: Time interval between
characters (Receiving) + 3.5 character time of the Modbus protocol. Make sure that the response wait time
is greater than time interval between char 3.5 character time.
2. Choose Modbus Slave in protocol type
Configurable parameters are shown as follows:
Baud Rate, Data Bits, Check Bit, Stops Bits, Slave Address, Transmission Mode, Communication Interface, Time
interval between Character (Sending) and Time Interval between Character (Receiving).
Interface of configuration view is shown as follow:
