WWW.SSTCOMM.COM
17
is in ms. The range of the parameter value is 300 to 60000ms.
Delay between polls: Delay between polls means delay between a response has been received and sending
next request. The range of the parameter value is 0 to 2500ms
Output mode: There are two types of output: Cycle: the write command will be sent periodically; Change of
Value: when the output data change, the write command will be sent;
Scan rate: Scan Rate is ratio of fast scan to slow scan
Enable Auto Demotion: When Enable Auto Demotion and a command is a fast scan command without
correct response for N times, then the command will demote a slow scan command.
Auto Demotion: Setting Modbus command does not respond to resending the times
Auto Demotion time: When the Demotion Time timeout the command will promote a fast command. How to
Action after N successive Response Timeout: Clear Data; Hold Data
Note: the shadow’s parameter can not be changed.
4.4.3 Configuring Modbus TCP Master Parameters
Protocol Type selection: Modbus TCP Master, Modbus TCP Slave
Response timeout: After the gateway sends request, it waits the Modbus slave’s response for max time
Which is in ms. the range of the parameter value is 300 to 60000ms.Default value is
1000ms
Delay between polls: Delay between polls means delay between a response has been received and
