Chapter 7 P2P Service
7-10
(4) P2P function
Let the driver execute READ or WRITE
1) READ
It is used when reading some area of partner device and save them. It is
applied to XGT Client and Modbus TCP client driver
Available memory area: P,M,K,F,T,C,U,Z,L,N,D,R,ZR,%Q,%I,%M etc.
2) WRITE
It is used when writing the data at some area of partner area. It is applied to
XGT Client and Modbus TCP client driver. Single and Continuous Write are
supported. Writing at up to 4 independent area is available.
Available memory area: P,M,K,F,T,C,U,Z,L,N,D,R,ZR,%Q,%I,%M
3) Send
It is used when sending User defined protocol to external device. It is applied
to user frame definition. Memory setting about Variable sized/Fixed sized
variable of relevant frame should be set. Before using this function, defining
the frame to send is necessary.
4) Receive
It is used when receiving frame from external device. User can’t select same
frame about each P2P Frame Receive function block. Rx function block about
Rx frame determines one.
(5) Condition flag
Define the condition to operate P2P block. A bit device is available for condition flag and
the P2P block will be operated at the rising edge of the condition flag.
(6) Command type
Decide details of Read operation. Single and Continuous are available for Instruction Type.
Up to 4 memory areas are available for Single Read function, and Continuous Read reads
as many bytes as defined on the ‘Data Size’ item.
(7) Data type
Define the format of the data the block will process. Bit, Byte, 2bytes (Word), 4bytes
(Double Word) and 8bytes (Long Word) data can be processed in Single read function and
BYTE only is available for Continuous read function.
(8) Number of variables.
It is activated when ‘Single’ is selected in the ‘Instruction’ field. Decide the number of areas
to read. Up to 4 is available.
(9) Data size
It is activated when ‘Continuous’ is selected in the ‘Instruction’ field. Since BYTE is fixed in
the Data type when XGT Client driver is used, Data Size can be assigned in BYTE size.
(10) Frame
Selects the relevant frame (Group) to execute communication in case of User frame
definition
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