Overview Of Functions - Yamaha RCX340 User Manual

1. Over view of functions
A network interface unit is a device that transmits and receives I/O information via a communication protocol
between a controller and a host control device.
We provide a lineup of products that support fieldbus (CC-Link, DeviceNet, PROFIBUS, etc.) or industrial
Ethernet (EtherNet/IP, PROFINET, EtherCAT, etc.).
In any of these networks, the robot controller (slave device) operates in accordance with commands via I/O
control from a host (master device).
While acting as distributed I/O for the host control device, the network interface unit simultaneously shares
I/O information with the controller. The I/O update cycle time between the controller and the network
interface unit is 5 ms.
The I/O update cycle time between the network interface unit and the host control device will vary depending
on the structure of the applicable network.
Host control device
Network unit
(Master)
Input
m, m+1, ..., m+x
Output
n, n+1, ..., n+y
I/O consists of a general-purpose input/output area, and a dedicated input/output area that has specific
significance such command input and status output that is optimized for control of robot controllers. Using
these, the robot controller can be controlled from the host control device.
The following methods can be used for control via I/O. Combining these methods makes it possible to control
the robot.
1. Controlling the robot controller directly using simple commands and status queries via remote
I/O's dedicated input/output.
Example) Dedicated input: cancel emergency stop, servo on, reset, start program execution, etc.
Dedicated output: CPU_OK, return-to-origin complete, etc.
2. Using remote commands to control the robot controller directly with advanced instructions and
status queries without programming.
Example) < Transmission >
SIW0 = 0x1031 (absolute reset command for robot no.1)
SIW2 = 0x0015 (axis designation: axis 1 through axis 4)
< Reception >
SOW = 0x0100 (executing command)
↓
SOW = 0x0200 (normal end)
3. Using remote I/O's general-purpose input/output to exchange desired information with an
external peripheral device, and load it into a robot program or sequence program for execution.
Example) WAIT SI(20)=1, 1000 ; Wait until SI(20) turns on; stop command if it does not turn on after 1 second.
OUT SO2(), 200
* For details on remote I/O and remote commands, refer to the Remote I/O Manual. For details on robot programs, refer
to the RCX340 Programming Manual.
←Status output
Conversion ←General-purpose I/O→
Command input→
; SO(27--20) turns on, and turns off after 200 ms.
Robot controller
(robot, I/O control)
Network unit
(Slave)
Output
SO, SOW
Conversion
Input
SI, SIW
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