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  • No : 22577
  • Release Date : 2018/09/03 17:29
  • Update : 2018/09/20 17:06
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Using the automatic communication function and dedicated instructions at the same time in MODBUS (R) interface module (QJ71MB91)

Can the automatic communication function and dedicated instructions be used at the same time on the same channel in
MODBUS (R) interface module (QJ71MB91)?
Category : 

Answer

The automatic communication function and dedicated instructions (MBRW instruction and MBREQ instruction) can be used
on the same channel.
However, when the automatic communication function and dedicated instructions are used on the same channel,
it is necessary to ensure a timing when dedicated instructions are executable.
The following is necessary for executing dedicated instructions properly.

(1) Setting the request interval timer, which is an automatic communication function parameter
(2) Creating a program for executing dedicated instructions while the automatic communication function is in a standby state.

For more details, refer to the following manual.
- "MODBUS (R) Interface Module User's Manual" Section 9.2.3
Product Name
Network Related Products
Series
MODBUS
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