Grouping I/O Data; I/O Data Input Mapping - GE D485 Instruction Manual

GROUPING I/O DATA

I/O DATA
INPUT MAPPING
D485 MODBUS TO DEVICENET CONVERTER – USER GUIDE
By default, all mapped I/O input data is grouped in one attribute and is used for polled
production data, and all mapped I/O output data is used as polled consumption (output)
data. The mailbox commands can be used to split this data into different attributes.
We have mapped 24 bytes of input data and 4 bytes of output data. The following
procedure splits the input data in 16 bytes of I/O input data and 8 bytes of explicit input
data.
1. Click on the Fieldbus item and change IO sizes option to "User defined" as shown
below.
2. Set the IO Size In (IO input data size) to 16 bytes (i.e. 0x000A) and the IO Size Out (IO
output data size) to 4 bytes.
3. With this setting, input data is divided into two parts: the first 16 bytes of input is IO
input data and remaining 8 bytes is explicit input data. All 4 bytes of output data is IO
output data.
The IO data can be further assigned to different attributes of I/O data input mapping object
A0h. Define the following five attributes out of 16 bytes of data.
Attribute Bytes
Attribute 1 (Input 1) 6 bytes
Attribute 2 (Input 2) 2 bytes
Attribute 3 (Input 3) 2 bytes
Attribute 4 (Input 4) 4 bytes
Attribute 5 (Input 5) 2 bytes
Figure 9-25: User defined IO sizes
Figure 9-26: Setting the IO sizes
Assignment
Phase current Ia, Ib, Ic
Average phase current
Neutral current
Average phase voltage
Motor status
APPLICATION EXAMPLE
9–15