YOKOGAWA Daqstation DX1000, Руководство пользователя

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IM 04L4B0-8E
Explicit Message
An Explicit message is a point-to-point, request/response-type communication.
System Configuration on PLC
Use the configuration tool to code an Explicit message as an MSG instruction in the
control logic. In the
MSG instruction, set all the information including a target device,
target register, and read/write. Download the created control logic to a PLC and execute
it.
On the DX, the data count to be accessed per MSG instruction should be 100 or less.
In Case of PLC-2, PLC-5, and SLC
• Commands
When creating an MSG instruction, specify a command. The DX supports the following
commands:
Target PLC Command name
PLC-2 PLC2 Unprotected Read/Write
PLC-5 PLC5 Word Range Read/Write
PLC5 Typed Read/Write
SLC SLC Typed Read/Write
• Specification of data to be accessed
Specify which of the data in the DX should be accessed. The PLC-2, PLC-5, and SLC
manage data to be accessed in units of "files."
For an external input channel, separate access destinations are used for reading and
writing.
Command: PLC2 Unprotected Read/Write
Data to be accessed File number
Data type: INT16
Type Number
Measurement
channel
000
2 00
• • • • • •
47 1046
48 047
Computation
channel
0 2000
02 200
• • • • • •
159 2058
160 2059
Communication
input data
C01 000
C02 00
• • • • • •
C59 3058
C60 3059
External input
channel
(for writing)
20 4000
202 400
• • • • • •
49 428
440 429
External input
channel
(for reading)
20 4500
202 4501
• • • • • •
49 478
440 479
"• • •" stands for data in numerical order.