Omron 3G3MV-PDRT2, Руководство пользователя

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Chapter 6
6-4
Message Communications
6-2 Sending Messages from an OMRON PLC
This section explains how to send and receive messages using a CS1W-DRM21(-V1) or CJ1W-
DRM21 DeviceNet Unit.
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Using CMND(490)
With a CS1W-DRM21(-V1) or CJ1W-DRM21 DeviceNet Unit, CMND(490) is used to send explicit
messages. To send an explicit message, it is necessary to place FINS command “2801” in front and
to send the command to the Master Unit. The Master Unit that receives the command converts the
command data to an explicit message and transfers it to the destination node. When sending an
explicit message, it is not possible to directly specify the destination node with CMND(490).
● S: Beginning Command Storage Word
Specify the beginning word address for the command data transferred to the DeviceNet Master Unit.
Preset the data to be transferred in consecutive words as shown in the following table.
● D: Beginning Response Storage Word
Specify the beginning word address of the area for storing responses to messages.
Word
address
Bits
15 to 8 7 to 0
S Command data (Set explicit message FINS command “2801.")
S+1 Node of Slave or Master for transmission
Address: 0 to 3F hex (0 to 63) Explicit message service code
Write: 10
Read: 0E
S+2 Class ID code (Set DeviceNet class code for relevant function.)
Set within 0001 to 002A, 0064, or 0094 to 0097 (hex) with Inverter's DeviceNet Communica-
tions Unit.
S+3 Instance ID code (Set DeviceNet instance code for relevant function.)
S+4 Attribute ID code
(Set DeviceNet attribute code for relevant
function.) Attached data (for writing)
--- Attached data (for writing)
S
D
C