Sauter Italia S.p.A.
RDT921F901
| Hardware manual ver. 1.0 | Code 114RDT921E104SAU
page 12 of 38
B1/-
RS-485 MODBUS master/slave port negative pole
A2/+
RS-485 MODBUS slave port positive pole
B2/-
RS-485 MODBUS slave port negative pole
The following table shows the Function codes supported by the device, provided that it works in commander mode with a MODBUS
communication protocol.
FUNCT.
CODE
MEANING
FC 01
read coils
FC 02
read discrete inputs
FC 03
read multiple registers
FC 04
read input registers
FC 05
write single coil
FC 06
write single register
FC 08
diagnostic
FC 15
write multiple coils
FC 16
write multiple registers
FC 23
read write multiple registers (maximum 10 registers)
The RS-485 MODBUS slave and RS-485 MODBUS master/slave ports can be used for one of the following operations:
-
device configuration (through the Parameters Manager set-up software system)
-
device supervision (through the Sauter Vision Center system monitoring and supervision (via Web) system)
-
MODBUS master function use with regard to other slave devices.
The CAN CANBUS port can be used to connect the device to the remote user interfaces of the
RDB900
range
The maximum number of devices that can be comprised in the CAN network (32) depends on the BUS load; the BUS load, in turn,
depends on the baud rate of the CANBUS communication and on the type of device (for instance, a CAN network can comprise 1
controller and 4 remote user interfaces with a baud rate of 500,000 baud).
USB
USB port
Through the USB port it is possible to carry out one of the following actions:
-
upload and download of application software (through the development environment or USB flash drive)
-
application software debug (through development environment)
-
device configuration (through the Parameters Manager set-up software system or a USB flash drive)
-
file transfer (through the development environment)
-
data logging (through a USB flash drive).
Please see paragraph 6 "CONFIGURATION" for the settings of the USB port.
