14-10
Chapter 14. Appendix
14 - 3 Precautions for Communication Function

Examples of operations when using both the normal memory area and RAM area for
the same parameter
Several operation examples are shown for the following setting example (common
to Modbus/RTU and /TCP).
The communication in the operation examples is applicable to both Modbus/RTU
and Modbus/TCP communication.
Note
• Chapter 9. User-defined Addresses Precautions when using both the normal
memory area and the RAM area for the same parameter (p.9-6)
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Setting example (common)
(1) Turn the C7G on. Do not write via communication yet.
(2) Configure the settings as shown below in the SLP-C7.
• SP bank
Loop 1 LSP group 1 LSP: 100.00
User-defined address bank
Data address 1007: Loop 1 LSP group 1 LSP, Decimal point position: 0, RAM
area
Data address 1008: Loop 1 LSP group 1 LSP, decimal point position: 0, Normal
area
(3) Write the parameters from the SLP-C7 to the C7G.

Operation example 1: Writing to the RAM area, and then writing a different value to the normal
memory area
(1) Turn the C7G on. The Loop 1 LSP group 1 LSP is 100.00.
(2) Write 200 to data address 1007 (RAM area) via communication.
The Loop1 LSP group 1 LSP changes to 200.00.
At this time, the value in RAM is 200.00, and in the normal memory area it is
100.00.
(3) Write 300 to data address 1008 (normal memory area) via communication.
Because this value is different from the value in RAM, it is written to the
normal memory area.
The Loop1 LSP group 1 LSP changes to 300.00.
At this time, the value in RAM is 300.00, and in the normal memory area it is
300.00.
(4) Turn the C7G off and then on again. The Loop1 LSP group 1 LSP is 300.00.
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