Explicit Message; System Configuration On Plc - YOKOGAWA DX1000 User Manual

Explicit Message

System Configuration on PLC

IM 04L4B0-8E
An Explicit message is a point-to-point, request/response-type communication.
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
PLC-2
PLC-5
SLC
• 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
Type Number
Measurement 
channel
2
• • •
47
48
Computation 0
channel
02
• • •
159
160
Communication C01
input data
C02
• • •
C59
C60
External input 20
channel
202
(for writing)
• • •
49
440
External input 20
channel
202
(for reading)
• • •
49
440
"• • •" stands for data in numerical order.
Command name
PLC2 Unprotected Read/Write
PLC5 Word Range Read/Write
PLC5 Typed Read/Write
SLC Typed Read/Write
File number
Data type: INT16
000
00
• • •
1046
047
2000
200
• • •
2058
2059
000
00
• • •
3058
3059
4000
400
• • •
428
429
4500
4501
• • •
478
479
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