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5 Modbus RTU VLT ® Micro Drive FC 51 Operating Instructions<br />
Response<br />
The normal response is an echo of the query, returned after the register contents have been passed.<br />
Field Name<br />
Example (HEX)<br />
Slave address 01<br />
Function 06<br />
Starting Address HI 00<br />
Starting Address LO<br />
1D<br />
No. of Points HI 00<br />
No. of Points LO 01<br />
Error Check (CRC) -<br />
Table 5.1: Normal response frame<br />
5<br />
5.5.6 Preset Multiple Registers (10HEX)<br />
Description<br />
This function presets a value into a sequence of holding registers.<br />
Query<br />
The query message specifies the register references to be preset. Register addresses start at zero, i.e. register 1 is addressed as 0.<br />
Example<br />
Write 65535 (655.35s) to PNU734 (4-bytes) mapped to 0 x 1CAB<br />
Field Name<br />
Example (HEX)<br />
Slave address 01<br />
Function 10<br />
Starting Address HI<br />
1C<br />
Starting Address LO<br />
AB<br />
No. of Registers HI 00<br />
No. of Registers LO 02<br />
Byte count 04<br />
Write Data HI (Register 7339) 00<br />
Write Data LO (Register 7339) 00<br />
Write Data HI (Register 7340)<br />
FF<br />
Write Data LO (Register 7340)<br />
FF<br />
Error Check (CRC) -<br />
Table 5.1: Request frame<br />
Response<br />
The normal response returns the slave address, function code, starting address, and quantity of registers preset.<br />
Field Name<br />
Example (HEX)<br />
Slave address 01<br />
Function 10<br />
Starting Address HI<br />
1C<br />
Starting Address LO<br />
AB<br />
No. of Registers HI 00<br />
No. of Registers LO 02<br />
Error Check (CRC) -<br />
Table 5.1: Normal response frame<br />
34 MG.02.A4.02 - VLT ® is a registered Danfoss trademark
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