Sharp JW-21MN Description for Computer Link Operation, Computer link function, Basic commands

Chapter: 10 Description for Computer Link Operation

When connected to a host computer with a network module that is compatible with the ME-NET specifications, the JW-21MN can transfer data.

10-1 Computer link function

The host computer communicates with each station number one by one. On the computer link, the host computer can communicate with any required station regardless of whether it is the master or slave station.

(1)The host computer instructs station number/communication contents/memory address/data etc. of the communicating station as a "command."

(2)The "command" receiving station processes this data and returns the result as "response."

（System example）

Master station (00) Slave station 01(8) Slave station 02(8) Slave station 03(8)

Command

Response

Host computer

In order to use the computer link function above, the host computer needs program application software. For programming this software, see the instruction manual attached with the network module.

Computer link commands of the ME-NET can be roughly classified into basic commands and optional commands.

[1] Basic commands

Commands mainly used with PCs.

These commands are the functions used to read and write relays and registers. The JW-21MN supports all of the basic commands (for both the 47 and 57 family). See the next page.

Reference

The 47 and 57 family: ME-NET computer link commands are divided into the 47 and 57 families of commands, which use different communication formats. However, you do not need to be concerned about the differences in these families when using the computer link function.

[2] Optional commands

Commands other than the basic commands. These are individual commands specific to each device. See page 10-3.

10

10-1