Modbus Agile
02/2011
42
Protocol
7.4
Time Monitoring Function
The Modbus protocol defines a pure Master/Slave operation. If a frequency inverter is addressed by
the bus master, other frequency inverters will only be addressed after the protocol with the first fre-
quency inverter has been completed or the timeout time has expired.
After a frequency inverter has sent a message, a waiting time of 2 ms must be kept. This time is
needed by the frequency inverter in order to switch off the RS485 transmitter. The bus master may
not send a new message until this time has elapsed.
Attention!
If the degree of utilization of the CPU is high (> 90%), the response time can be more than 500 ms.
Note:
The specified times are valid for operation with RS485 and RS232.
Summary of Contents for Agile
Page 1: ...Agile Modbus Communication manual Frequency inverter 230V 400V ...
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Page 5: ...Modbus Agile 5 02 2011 13 2 Warning Messages Application 76 13 3 Error Messages 76 INDEX 77 ...
Page 44: ...Modbus Agile 02 2011 44 Handling of Data Sets Cyclic Writing ...
Page 69: ...Modbus Agile 69 02 2011 10 2 1 Statemachine diagram ...
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