JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors 151
6.3 PROFINET objects
6.3.4 Accessing parameter objects
Parameter objects are accessible by use of acyclic data. In Siemens Step 7, this is done
with the Special Function Blocks SFB52 and SFB 53.
Write parameter
Write to parameters is done with the SFB53, as shown below.
The data block must be setup prior to use, in this example "Req_Write_DB".
Example:
Write 0xFEDCBA98 to object 0x12 subobject 0x31 ( = motor register no. 49), in JVL
device with ID 2042.
Please notice: Even though all registers is transmitted as 32 bit, some of them
originally derive from 16 bit in the case of MAC050-141. In those situations it
is necessary to interpret them as 16 bit to get the sign correct.
Name Description Example
ID ID of device 2042
Index Object and subobject to write to
High byte = Object, Low byte = Subobject
(parameter/register no.)
0x1231 (Object 0x12, parameter 0x31)
LEN Length of data 4 (always 4 byte = 32 bit)
Record 32 bit data to write 0xFEDCBA98
!
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