Instructions

Parameter Data Initialization (Explicit Data) 120
Doc: HMSI-27-314, Rev. 3.10Anybus Communicator EtherNet/IP / Modbus-TCP User Manual
A.3 Mapping Input Parameter Data to EtherNet/IP
Example
In the following example, a total of 160 bytes of data will be mapped to the Parameter Data Input Map-
ping Object. The data is made up of 5 separate data blocks, each associated with a particular instance
attribute.
To achieve this, perform the following steps:
1. Add a new mailbox message to the configuration (see “Add a Mailbox Message” on page 119).
2. Change the ‘Command’-value in the mailbox header to 0084h.
3. Adjust the ‘Data Size’-value in the mailbox header (left column). In this example, the size shall
be set to 20 (0014h), since each mapped attribute occupies 4 bytes of mailbox data.
4. Specify the mapping locations for the attributes in the mailbox data section. As mentioned above,
each mapping entry needs 4 bytes; two bytes specifying the offset
1
of the data block, followed by
two bytes which specify the length of the data block. Note that these values must be entered in big
endian (Motorola) format.
In this example, this gives us the following mailbox data:
As shown in the table above, the attributes are numbered in the order they are mapped, i.e. it is
possible to rearrange the attribute numbering by physically changing the mapping order in the
mailbox data.
5. To save the new mailbox, select ‘Apply changes’ in the ‘File’-menu.
1. The offset is specified from the start of the parameter data, not from the physical memory location in the
Anybus Communicator.
Mailbox Data
Attribute no. Comments
Location Data
0x00 0x00 1 Offset = 0000h
0x01 0x00
0x02 0x00 Size = 32 bytes
0x03 0x20
0x04 0x00 2 Offset = 0040h
0x05 0x40
0x06 0x00 Size = 64 bytes
0x07 0x40
0x08 0x00 3 Offset = 0080h
0x09 0x80
0x0A 0x00 Size = 16 bytes
0x0B 0x10
0x0C 0x00 4 Offset = 0090h
0x0D 0x90
0x0E 0x00 Size = 32 bytes
0x0F 0x20
0x10 0x00 5 Offset = 00F0h
0x11 0xF0
0x12 0x00 Size = 16 bytes
0x13 0x10