Danfoss VLT AutomationDrive FC 360 Design Manual page 110

Design Guide | VLT® AutomationDrive FC 360
Table 50: Query
Field name
Follower address
Function
Starting address HI
Starting address LO
Number of points HI
Number of points LO
Error check (CRC)
Response
The coil status in the response telegram is packed as 1 coil per bit of the data field. Status is indicated as: 1 = ON; 0 = OFF. The lsb of the
1st data byte contains the coil addressed in the query. The other coils follow toward the high-order end of this byte, and from low order
to high order in subsequent bytes.
If the returned coil quantity is not a multiple of 8, the remaining bits in the final data byte are padded with values 0 (toward the high-
order end of the byte). The byte count field specifies the number of complete bytes of data.
Table 51: Response
Field name
Follower address
Function
Byte count
Data (coils 40–33)
Data (coils 48–41)
Error check (CRC)
Coils and registers are addressed explicitly with an offset of -1 in Modbus. For example, coil 33 is addressed as coil 32.
Force/Write Single Coil (05 hex)
9.10.3
Description
This function forces the coil to either ON or OFF. When broadcast, the function forces the same coil references in all attached followers.
Query
The query telegram specifies the coil 65 (parameter write control) to be forced. Coil addresses start at 0, that is, coil 65 is addressed as 64.
Force data = 00 00 hex (OFF) or FF 00 hex (ON).
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Example (hex)
01 (drive address)
01 (read coils)
00
20 (32 decimals) coil 33
00
10 (16 decimals)
–
Example (hex)
01 (drive address)
01 (read coils)
02 (2 bytes of data)
07
06 (STW = 0607hex)
–
NOTICE
AJ435824192086en-000101 / 130R1295