Robotiq 2-Finger Adaptive Robot Gripper - 200
Instruction Manual
Robotiq inc. © 2008-2013
52
4.9 MODBUS RTU communication protocol
The Gripper can be controlled over USB using the Modbus RTU protocol on the mini-USB port. This section is
intended to provide guidelines for setting up a Modbus scanner that will adequately communicate with the Gripper.
For a general introduction to Modbus RTU and for details regarding the CRC algorithm, the reader is invited to read
the Modbus over serial line specification and implementation guide available at:
http://www.modbus.org/docs/Modbu
For debugging purposes, the reader is also invited to download one of many free Modbus scanners such as the CA
from
available at:
S Modbus Scanner
Chipkin Automation Systems
http://www.chipkin.com/cas-modbus-scanner
4.9.1 Connection setup
The following table describes the connection requirement for controlling the Gripper using the Modbus RTU protocol.
PROPRIETY
VALUE
Physical Interface
USB (virtual serial connector)
drivers can be found at
Baud Rate
115,200 bps
Data Bits
8
Stop Bit
1
Parity
None
Number Notation
Hexadecimal
Supported Functions
Read Holding Registers (FC03)
Preset Single Register (FC06)
Preset Multiple Registers (FC16)
Exception Responses
Not supported
Slave ID
0x0009 (9)
Robot Output / Gripper Input First Register
0x03E8 (1000)
Robot Input / Gripper Output First Register
0x07D0 (2000)
Each register (word - 16 bits) of the Modbus RTU protocol is composed of registers (bytes – 8 bits) from the
2
Gripper. The first Gripper output Modbus register (0x07D0) is composed from the first Robotiq Adaptive Gripper
2
2-Finger – 200 registers (byte 0 and byte 1).