Omron CJ1W-NC271 - 12-2009, Operation Manual

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MECHATROLINK Overview
Section 6-1
6-1 MECHATROLINK Overview
MECHATROLINK
The Position Control Unit (PCU) uses MECHATROLINK (see note) to connect
to the Servo Drive.
Note MECHATROLINK is a registered trademark of Yaskawa Electric Corporation.
MECHATROLINK is a high-speed field network developed by Yaskawa Elec-
tric Corporation. High-speed, high-precision motion control is possible for up
to 30 (see note) MECHATROLINK-compatible devices connected to a single
communications line using high-speed communications of up to 10 Mbps.
Note Up to 16 Servo Drives can be connected to the CS1W/CJ1W-NCF71, up to 2
Servo Drives can be connected to the CS1W/CJ1W-NC271, and up to 4
Servo Drives can be connected to the CS1W/CJ1W-NC471. The highest axis
number that can be set in the Position Control Unit is 16.
MECHATROLINK is available with two baud rates: 4 Mbps for MECHA-
TROLINK-I and 10 Mbps for MECHATROLINK-II. This PCU is designed for
MECHATROLINK-II. The connected devices must be compatible with
MECHATROLINK-II.
In this manual, the use of MECHATROLINK refers to MECHATROLINK-II
unless otherwise specified.
MECHATROLINK Specifications
Note (1) This distance is the total length of the cable connected between devices.
However, the maximum length depends on the number of devices con-
nected and whether Repeaters are used. For details, refer to
3-4-1
MECHATROLINK-II Communications Wiring .
(2) Up to 16 devices can be connected to the CS1W/CJ1W-NCF71, up to 2
devices can be connected to the CS1W/CJ1W-NC271, and up to 4 devic-
es can be connected to the CS1W/CJ1W-NC471.
(3) The PCU data length is fixed at 32 bytes.
MECHATROLINK-
compatible Devices
Supported by PCU This PCU is designed to be used with MECHATROLINK-II. The maximum
number of stations that can be connected to the PCU is 16, and the station
addresses of the MECHATROLINK-compatible devices must be set in the
range 1 to 16. The MECHATROLINK-II communications settings at the PCU
are fixed, as follows:
Item Specifications
Communications protocol MECHATROLINK-II
Baud rate 10 Mbps
Maximum transmission distance 50 m (See note 1.)
Minimum distance between stations 0.5 m
Transmission media Shielded, twisted-pair cables
Maximum No. of stations 30 slave stations max. (See note 2.)
Topology Bus
Transfer cycle 250
μ
s to 8 ms
Communications method Master-slave, totally synchronous
Encoding Manchester encoding
Data length 17 bytes/32 bytes selectable (See note 3.)
Item Specifications
Baud rate 10 Mbps
Data length 32 bytes (fixed) (See note.)