Explicit Devicenet Messages - Omron DeviceNet CV Series Operation Manual

C200H I/O Link Units
6-1-8

Explicit DeviceNet Messages

C200H I/O Link Unit Explicit Message List
BYTE DATA READ
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7. Click the Reset button to enable the edited parameters.
A reset confirmation message will be displayed. Click the Yes button to
confirm. When the C200H I/O Link Unit is reset, the corresponding Special
I/O Unit Restart Bit in AR 01 of the PLC will be turned ON.
If the Read/Write Area sizes have been changed, you must correct the
Master's I/O allocation settings.
Note Once the Read/Write Area has been set, data will be automatically transferred
and received when the Master and Slaves are restarted.
Explicit DeviceNet messages (commands) can be sent from the Master to
write data to any area of the CPU Unit of the PLC to which the C200H I/O Link
Unit is mounted.
This section the explicit messages supported by the C200H I/O Link Unit, and
provides usage examples. For further details on using explicit messages on
the Master Unit, refer to the Master Unit's Operation Manual.
Explicit message
BYTE DATA READ
BYTE DATA WRITE
WORD DATA READ
WORD DATA WRITE
Error response
Use BYTE DATA READ and BYTE DATA WRITE when sending explicit mes-
sages (commands) from an OMRON DeviceNet Master. When using other
manufacturer's DeviceNet Masters to send explicit messages (commands),
use WORD DATA READ and WORD DATA WRITE.
The number of bytes specified for Class ID and Instance ID differ according to
the type of Master used. For an OMRON DeviceNet Master, 2 bytes (4 digits)
are specified. For an example of this, see 6-1-9 Using Explicit DeviceNet Mes-
sages .
BYTE DATA READ will read data from any area of CPU Unit of the PLC to
which the C200H I/O Link Unit is mounted. Data is returned from the leftmost
bit to the rightmost bit.
Function
Reads the specified node's data in bytes.
Word data is read from the leftmost bit to
the rightmost bit.
The maximum data size for read data is 200
bytes.
Writes the specified node's data in byte.
Word data is written from the leftmost bit to
the rightmost bit.
The maximum data size for write data is 200
bytes.
Reads the specified node's data in words.
Word data is read from the rightmost bit to
the leftmost bit.
The maximum data size for read data is 100
words.
Writes the specified node's data in words.
Word data is written from the rightmost bit
to the leftmost bit.
The maximum data size for write data is 100
words.
When an error occurs in an explicit mes-
sage (command), an error response is sent
returned by the C200H I/O Link Unit.
Section 6-1
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