Panasonic FP Series User Manual

Data transfer via communication ports
773
Part III FP Instructions
F146_READ_DATA
Read Data from Slave
The data specfied by MasterWordAddress is requested by the master from the slave area
specified by SlaveWordAddress. The variable SlaveAddress determines the slave's station
number and the slave's COM port (1 or 2).
General programming information for F145 and F146 (see page 766)
PLC types
Availability of F146_READ_DATA (see page 1321)
Variable Data
type
Function
Port Specifies the slave's COM port (1 or 2) via system
variable:
SYS_COM1_PORT
SYS_COM2_PORT
SlaveAddress
ANY16
Address of the remote station (1-99).
SlaveData The data of the slave to which the data is written.
MasterData
ANY
The data of the master to which the data (read by the
slave) is written.
For Relay T/C Register Constant
Port WX WY WR WL - - DT LD FL -
Slave
Address
WX WY WR WL - - DT LD FL dec. or hex.
Master
Data
WX WY WR WL - - DT LD FL -
Slave Data WX WY WR WL - - DT LD FL -
No. IEC address Set If
R9007 %MX0.900.7 permanently
R9008 %MX0.900.8 permanently
 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-C
OM
Master/Slave or Modbus RTU
Master/Slave.
 the COM port selected requires a
communication cassette that has not
been installed.
Description
Use this instruction to request data from a slave via the serial port (COM1 or COM2) using
MEWTOCOL or Modbus RTU protocol (see communication mode (see page 712)), as defined in
the system register setting
s (see page 1273) of port used. Master and slave must both use the
same protoc
ol. The master must be configured in Master/Slave mode. The slave can be configured
either in Master/Slave mode or in Slave mode only.
Data types
Operands
Error flags

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