Specifications

Field Name Example (HEX)
Slave address 01
Function 06
Register address HI 03 (Register address 999)
Register address LO E7 (Register address 999)
Preset data HI 00
Preset data LO 01
Error check (CRC) -
Table 7.30 Query
Response
The normal response is an echo of the query, returned
after the register contents have been passed.
Field Name Example (HEX)
Slave address 01
Function 06
Register address HI 03
Register address LO E7
Preset data HI 00
Preset data LO 01
Error check (CRC) -
Table 7.31 Response
7.10.6 Preset Multiple Registers (10 HEX)
Description
This function presets values into a sequence of holding
registers.
Query
The query message specifies the register references to be
preset. Register addresses start at zero, i.e. register 1 is
addressed as 0. Example of a request to preset 2 registers
(set parameter 1-24 = 738 (7.38 A)):
Field Name Example (HEX)
Slave address 01
Function 10
Starting address HI 04
Starting address LO D7
No. of registers HI 00
No. of registers LO 02
Byte count 04
Write data HI
(register 4: 1049)
00
Write data LO
(register 4: 1049)
00
Write data HI
(register 4: 1050)
02
Write data LO
(register 4: 1050)
E2
Error check (CRC) -
Table 7.32 Query
Response
The normal response returns the slave address, function
code, starting address, and quantity of registers preset.
Field Name Example (HEX)
Slave address 01
Function 10
Starting address HI 04
Starting address LO D7
No. of registers HI 00
No. of registers LO 02
Error check (CRC) -
Table 7.33 Response
Installation and Set-up VLT® HVAC Drive FC 102 Design Guide
MG16C102 - Rev. 2013-08-20 177
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