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Availability of F145F146_MODBUS_MASTER (see page 1321)
PLC types:
Data types
Variable
Port
SlaveAddress
FunctionCode*
StartRegister
NumberOfRegisters*
MasterData
Operands
For
Port
Slave Address
Function Code*
Start Register
NumberOf Registers*
Master Data
Error flags
No.
IEC
address
%MX0.900.7
R9007
%MX0.900.8
R9008
22.5.1 Evaluation of IsF145146NotActive flag
In this section:
Is145F146NotActive (see page 787)
-
Data
Function
type
Specifies the slave's COM port (1 or 2) via system variable:
SYS_COM1_PORT, SYS_COM2_PORT
Address of the remote station (0–255).
SYS_MODBUS_01_READ_COIL
SYS_MODBUS_02_READ_INPUT
SYS_MODBUS_03_READ_HOLDING_REGISTER
SYS_MODBUS_04_READ_INPUT_REGISTERS
SYS_MODBUS_05_FORCE_COIL
SYS_MODBUS_06_PRESET_REGISTER
ANY16
SYS_MODBUS_15_FORCE_COILS
SYS_MODBUS_16_PRESET_REGISTERS
Starting address (0–65535). The address type depends on the
command specified by FunctionCode*.
Number of transmission bits or words.
1–2040 for function codes 01, 02
2–2040 for function code 15
1–127 for function codes 03, 04
2–127 for function code 16
ANY
The master data which is written to the slave.
Relay
WX
WY
WR
WL
WX
WY
WR
WL
-
-
-
-
WX
WY
WR
WL
-
-
-
-
WX
WY
WR
WL
Set
If
permanently
port 0 (global transmission) gets no response from COM1 or
COM2.
permanently
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.
Data transfer via communication ports
T/C
Register
DT
LD
FL
-
-
DT
LD
FL
-
-
-
-
-
-
DT
LD
FL
-
-
-
-
-
-
DT
LD
FL
Constant
-
-
-
system
-
-
dec. or hex.
-
781
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