User Manual of EM730 Series Inverter function is invalid if set to 0), it will be regarded communication timeout. Fig. 7-30 Schematic Diagram of Communication Timeout Example of this function: If the master station must send data to a slave station (e.g. #1) within a certain period, you can use the communication timeout function of #1 slave station and set F10.03>T. The communication timeout protection will not be triggered during normal communication. However, if the master station does not send data to #1 slave station within the specified time T, and this lasts for more than the set value of F10.03, a communication protection ( E16 ) will be reported.
Once informed of the “communication protection of #1 slave station”, the staff can conduct troubleshooting. ★ The set value of F10.03 must be greater than the set time T, but must not be too large, in order to avoid adverse effects arising from too long operation in the protection status. ★ F10.03 should be set to be invalid under normal circumstances. This parameter will be set only in the continuous communication system to monitor the communication. data frame 1 by the inverter to data parsing and return.
To ensure the stable operation of the The response delay (t wait2 ) is defined as the time interval from the reception of the valid protocol chip, the response delay should be set within 1~20ms (it must not be set to 0). If the communication data involves EEPROM operation, the actual response delay time will be extended, i.e. “EEPROM operation time + F10.04”. 1: valid data frame: sent by the external master station to inverter, in which the function code, data length and CRC are correct. Fig. 7- 31 shows the data sending segment (t send ), sending end segment (t wait1 ), 75176-to-sending wait segment (t wait2 ), data return segment (t return ), and 75176-to-receiving wait segment (t wait3 ).
253 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F10.04 Modbus response delay 1 ~ 20 ms 2 ● 0x0A04