KROHNE ALTOSONIC V Modbus EN - Manual (Page 14)

ALTOSONIC V
ModBus Manual 0300 rev07 E 7.30855.35.00 Page 14 of 64
The next byte transmitted (01) addresses coils 29 and 28, with the least significant bit addressing the
lowest coil (28) in this set. Unused bits in the last data byte should be left zero.
Request:
Coil
address
Quantity
Of points
Byte
counts
Force
data
Error
check
Trailer Header
--
Slave
Address
11(h)
Function
0F(h)
Hi
00(h) Low
13(h) Hi
00(h) Low
0A(h)
02(h) Hi
CD(h) Low
01(h)
--
--
Response
The normal response returns the slave address, function code, starting address, and quantity of coils
forced.
Coil
Address
Quantity
Of points
Error check Trailer Header
--
Slave
Address
11(h)
Function
0F(h)
Hi
00(h) Low
13(h) Hi
00(h) Low
0A(h)
--
--
If the request is not applicable an exception response will be sent.
See chapter 5.10 for exception responses.
5.9 Function 16: WRITE MULTIPLE HOLDING REGISTERS
Description
Function 16 pre-sets values into a sequence of holding registers (4x reference).
When the address is a broadcast, the function pre-sets the same register references in all attached
slaves.
Query
The query message specifies the register references to be pre-set. Registers are addressed starting at
zero (register 1 is addressed as 0).
Example
Here is an example of a request to pre-set two registers starting at 40002 to 00 0A end 01 02 hex, in
slave device 17.
Starting
address Quantity
Registers Byte
counts
Data
Error
check Trailer
Header
--
Slave
Addres
s
11(h)
Funct.
10(h) Hi
00(h)
Low
01(h)
Hi
00(h)
Low
02(h) 04(h)
Hi
00(h)
Low
0A(h)
Hi
01(h)
Low
02(h) -- --
Response
The normal response returns the slave address, the function code, starting address, and quantity of
registers pre-set.
Starting
Address Quantity
Of points Error
check Trailer
Header
--
Slave
Address
11(h)
Function
10(h)
Hi
00(h)
Low
01(h)
Hi
00(h)
Low
02(h) -- --
If the request is not applicable an exception response will be sent.
See chapter 5.10 for exception responses.