Data transfer via communication ports
773
Part
III F
P
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
)
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-COM
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 settings (see page 1273) of port used. Master and slave must both use the
same protocol. 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
Содержание FP Series
Страница 27: ...Chapter 1 Basics ...
Страница 60: ...Chapter 2 Data transfer instructions ...
Страница 62: ...Chapter 3 Arithmetic instructions ...
Страница 88: ...Chapter 4 Bitwise Boolean instructions ...
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Страница 94: ...Chapter 5 Bit shift instructions ...
Страница 100: ...Bit shift instructions 99 Part II IEC Instructions LD ...
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Страница 104: ...Chapter 6 Comparison instructions ...
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Страница 108: ...Comparison instructions 107 Part II IEC Instructions LD ...
Страница 114: ...Chapter 7 Conversion instructions ...
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Страница 254: ...Chapter 8 Selection instructions ...
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Страница 262: ...Chapter 9 String instructions ...
Страница 280: ...String instructions 279 Part II IEC Instructions LD ...
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Страница 282: ...Chapter 10 Date and time instructions ...
Страница 306: ...Chapter 11 Bistable instructions ...
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Страница 312: ...Chapter 12 Edge detection instructions ...
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Страница 316: ...Chapter 13 Counter instructions ...
Страница 324: ...Chapter 14 Timer instructions ...
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Страница 342: ...Chapter 15 Arithmetic instructions ...
Страница 360: ...Arithmetic instructions 359 Part III FP Instructions LD ST IF DF start THEN F35_INC increment_value END_IF ...
Страница 362: ...Arithmetic instructions 361 Part III FP Instructions LD ST IF DF start THEN F36_DINC increment_value END_IF ...
Страница 384: ...Arithmetic instructions 383 Part III FP Instructions LD ST IF DF start THEN F37_DEC decrement_value END_IF ...
Страница 431: ...Arithmetic instructions 430 Part III FP Instructions LD ST IF start THEN F87_ABS abs_value END_IF ...
Страница 433: ...Arithmetic instructions 432 Part III FP Instructions ST IF start THEN F88_DABS abs_value END_IF ...
Страница 449: ...Arithmetic instructions 448 Part III FP Instructions LD ST IF DF start THEN F85_NEG negotiate_value END_IF ...
Страница 508: ...Chapter 16 Bistable instructions ...
Страница 512: ...Chapter 17 Bitwise Boolean instructions ...
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Страница 556: ...Chapter 18 Bit shift instructions ...
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Страница 604: ...Chapter 19 Comparison instructions ...
Страница 622: ...Chapter 20 Conversion instructions ...
Страница 687: ...Conversion instructions 686 Part III FP Instructions LD ...
Страница 702: ...Chapter 21 Counter instructions ...
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Страница 712: ...Chapter 22 Data transfer via communication ports ...
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Страница 786: ...Chapter 23 Data transfer via network ...
Страница 798: ...Data transfer via network 797 Part III FP Instructions LD ...
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Страница 806: ...Chapter 24 Data transfer within the PLC ...
Страница 866: ...Chapter 25 Date and time instructions ...
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Страница 878: ...Chapter 26 Selection Instructions ...
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Страница 884: ...Chapter 27 Edge detection instructions ...
Страница 890: ...Chapter 28 High speed counter instructions ...
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Страница 914: ...Chapter 29 Timer instructions ...
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Страница 938: ...Chapter 30 Process control instructions ...
Страница 966: ...Process control instructions 965 Part III FP Instructions ...
Страница 970: ...Chapter 31 FP e display instructions ...
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Страница 980: ...Chapter 32 System register instructions ...
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Страница 998: ...Chapter 33 Special instructions ...
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Страница 1008: ...Chapter 34 Program execution control instructions ...
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Страница 1092: ...Chapter 36 Analog unit instructions ...
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Страница 1134: ...Chapter 37 GT panel instructions ...
Страница 1138: ...Chapter 38 High speed counter instructions ...
Страница 1164: ...High speed counter instructions 1163 Part IV Tool Instructions ...
Страница 1172: ...Chapter 39 Pulse output instructions ...
Страница 1177: ...Pulse output instructions 1176 Part IV Tool Instructions LD ...
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Страница 1246: ...Chapter 40 Appendix Programming Information ...
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