Toshiba ICC Multiprotocol Ethernet Interface ASD-G9ETH User Manual download pdf (Page 88)

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13.3.3 SLC-5/05 Example: Read a Single Register

The configuration and execution for reading a single register is in general

identical to that required for reading a block of registers as detailed in section

13.3.2. The only difference is in the configuration of the MSG instruction.

Figure 92 shows an example MSG instruction’s General tab, which will read a

single element (N24:2, which corresponds to the drive’s “inverter status 1”

Figure 92: Read the Drive’s Status Register

13.3.4 SLC-5/05 Example: Multiple MSG Instructions

At times, reading from different groups of registers may be necessary. For

example, a specific application may require some registers located in various

disjoint locations in the register map. To accomplish this task efficiently,

multiple MSG instructions can be implemented in the PLC program.

The configuration and execution for implementing multiple MSG instructions is

in general identical to that required for implementing just one MSG instruction.

Each MSG instruction will require its own message control file. In the case of

read MSG instructions, more than one instruction may use the same data file to

store the received register values, but the storage locations must not overlap.

Figure 93 shows an example of two MSG instructions, each accessing different

target integer files. It is evident from this logic that N20 and N21 are the two

independent message control files created for these instructions.

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Toshiba ICC Multiprotocol Ethernet Interface ASD-G9ETH User Manual Page 88