Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 317)

Publication 1760-UM002B-EN-P - March 2005
Pico-Link and Point-to-Point Serial Connections 6-11
The standard settings for the input and output devices are:
Station number (Pico-Link ID) and baud rate can be specified via station 1.
Station Message Types
The Pico-Link network recognizes various message types. They are:
• Output data of station 1 (Q., S.) which is sent to stations without
programs.
• Network outputs and inputs sent and received between stations with
programs (*SN, *RN).
• Data sent and received via the network between stations with programs
(PT and GT function blocks).
• Inputs, outputs, station status (I, R, Q, S) transfers.
• Loading programs to and from every station.
The Pico-Link is based on a CAN (Controller Area Network) system. Each
message type has its own ID. The message priority is determined via the
respective ID. This is important in transmission borderline cases to ensure that
all messages reach their destination.
Transfer Behavior
Network CPU data transfer to program image
The Pico GFX-70 network connection is equipped with its own CPU.
Network data can therefore be processed while the program is running. After
each program cycle, the status of the network data is written to the operand
image of the program and the send data is read from the image. The program
runs through the next cycle with this data.
SEND IO
✓
REMOTE RUN
✓
REMOTE IO
✓