Panasonic FP Series User Manual

Data transfer via communication ports
766
Part III FP Instructions
22.5 Data transfer in master/slave mode (MEWTOCOL/Modbus RTU)
General Programming Information for F145 and F146
 It is not possible to execute multiple F145_WRITE_DATA (see page 766) and
F146_READ_DATA instru
ctions for the same communication port simultaneously.
The program should be set up so that these instructions are executed when the
SEND/RECV execution enabled flag (R9044: COM1/R904A: COM2) is ON.
COM1 sys_bIsComPort1F145F146NotActive R9044
COM2 sys_bIsComPort2F145F146NotActive R904A
0: Execution inhibited. (SEND/RECV
instruction being executed.)
1: Execution enabled.
 The SEND (i.e. F145_WRITE_DATA) instruction only requests that data be sent,
but the actual processing takes place when the ED instruction is executed. The
SEND/RECV execution end flag (R9045: COM1, R904B: COM2) can be used to
check whether or not the transmission has been completed.
COM1 sys_bIsComPort1F145F146Error R9045 0: Completed normally.
1: Completed with error. (The error code
is stored in DT90045.)
COM1 sys_wComPort1F145F146ErrorCode DT90124 If the transmission has been completed
with an error (R9045 is ON), the contents
of the error (error code) are stored.
COM2 sys_bIsComPort2F145F146Error R904B 0: Completed normally.
1: Completed with error. (The error code
is stored in DT90125.)
COM2 sys_wComPort2F145F146ErrorCode DT90125 If the transmission has been completed
with an error (R904B is ON), the contents
of the error (error code) are stored.
 For detailed information, please refer to error codes (see page 1306). If the error
code is 16#73, a communication time-out error has occurred. The time-out length
can be set from 10.0ms to 81.9s (in units of 10ms) using system register 32. The
default value is 10s.
Error code Description
16#73 Time-out: waiting for response
 For global transmission (the transmission performed by specifying 16#00 for the
unit no.), the program should be set up so that the transmission is executed after
the maximum scan time has elapsed.
 The F145 or F146 instruction cannot be executed if the target address is a
special internal relay (from R9000) or a special data register (from DT90000).
 The compiler will use file registers in case the data registers are occupied.
 For the table of available Modbus commands, please refer to
F145F146_MODBUS_COMMAND (see page 777) or
F145F
146_MODB
US_MASTER (see page 779).

Panasonic FP Series Specifications

General

Mounting	DIN rail
Type	PLC
Communication Interface	RS-232, RS-485, Ethernet (depending on model)
Input Voltage	100-240V AC or 24V DC (depending on model)
Output Type	Relay, Transistor
I/O Points	Varies by model
Operating Temperature	0°C to 55°C
Dimensions	Varies by model
Weight	Varies by model