Panasonic FP Series Programming Manual page 769

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Data transfer via communication ports

 If the slave data is not available in the user area of the

master, please use either the instruction

F145_WRITE_DATA_TYPE_OFFS (see page 769) or the

F145F146_MODBUS_COMMAND (see page 777).

 For another station number outside the range (0-99) or

another start register as available in the table of modbus

commands (see page 777), please use the modbus function

blocks of the Modbus Library for FPWIN Pro

(NCL-MODBUS-LIB).

In this example the function has been programmed in ladder diagram (LD) and structured text (ST).

In the global variable list you define variables that can be accessed by all POUs in the project.

All input and output variables used for programming this function have been declared in the POU

The system variable sys_bPulse1s is copied to bBool1. If bWrite1 and

sys_bIsComPort1F145F146NotActive are set to TRUE, bBool1 is written to the output Y38 of

 port 0 (global transmission) gets no

response from COM1 or COM2.

 slave data or master data exceeds

the available address range.

 the communication mode (see page

712) is not set to

MEWTOCOL-COM Master/Slave or

Modbus RTU Master/Slave.

 the COM port selected requires a

communication cassette that has not

been installed.