SST Automation GT200-BM-2RS, User Manual, Page: 18 / 27

User Manual
Modbus/BACnet IP Gateway
GT200-BM-2RS
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 Baud Rate - 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400;
 Data Bits - 8 (currently only support 8 data bits);
 Check Bit - None, Odd, Even, Mark, Space;
 Stop Bits - 1, 2;
 Transmission mode -RTU;
 Response timeout - When the Modbus master send commands, the time waiting for response from the
slave, the range is 300~60000ms;
 Delay between polls - After one Modbus command has been sent and has received correct response, the
delay time before next command being sent, the range is: 0 ~ 2500ms;
 Output Mode - Modbus write command (command output) has two output modes: cycle and change of
value output;
Change of Value: When the output data has changed, it outputs the write command and stop outputting
after receiving correct response;
Cycle: the same with Modbus read command output mode, and output according to the scan rate;
 Scan rate - Ratio of slow scan cycle to fast scan cycle;