User Manual
Universal Serial/PROFIBUS DP Gateway
GT200-DP-RS
WWW.SSTCOMM.COM
23
“00” to fill empty bytes:
The M bytes of “00” are used to fill the empty if the output data is shorter then the
PROFIBUS DP module length (for example, when sending only 4 bytes with an 8-byte output module, the left
(8-4) bytes are filled with “00”).
Note:
1. The data of the frame are in hexadecimal.
2. For output frame, the transaction number must be changed to trigger the output. Otherwise the data won’t be
sent to serial devices.
3. The data length of PROFIBUS DP output module should be at least (N+2) bytes.
4. (N+M+2) should be equal to the length of PROFIBUS DP output module data length.
5. In DP Integrated Configuration mode, if disable the “
”, the Data length value (N)
is fixed “11”.
Example:
When using an 8-byte output module, output 3-byte data “01 02 03”. The last transaction number is 0.
The current output frame should be:
[01][03][01][02][03][00][00][00][00]
When using an 8-byte input module, receive 4-byte data “03 04 05 06”. The last transaction number is 2.
The received frame is:
[03][04][03][04][05][06][00][00][00]
