Omron SX inverter manual

10. Serial communication
The VSD provides possibility for different types of serial
communication.
• Modbus RTU via RS232/485
• Fieldbuses as Profibus DP and DeviceNet
• Industrial Ethernet type Modbus/TCP
10.1 Modbus RTU
The VSD has an asynchronous serial communication
interface behind the control panel. The protocol used
for data exchange is based in the Modbus RTU protocol,
originally developed by Modicon. the physical
connection is RS232. The VSD acts as a slave with
address 1 in a master-slave configuration. The communication
is half-duplex. It has a standard no return
zero (NRZ) format.
The baud rate is fixed to 9600.
The character frame format (always 11 bits) has:
• one start bit
• eight data bits
• two stop bits
• no parity
It is possible to temporarily connect a personal computer
with for example the software EmoSoftCom
(programming and monitoring software) to the RS232
connector on the control panel. This can be useful
when copying parameters between variable speed
drives etc. For permanent connection of a personal
computer you have to use one of the communication
option boards.
NOTE: This RS232 port is not isolated.
Correct and safe use of a RS232 connection
depends on the ground pins of both ports
being the same potential. Problems can
occur when connecting two ports of e.g.
machinery and computers where both ground pins are
not the same potential. This may cause hazardous
ground loops that can destroy the RS232 ports.
The control panel RS232 connection is not galvanic
isolated.
The optional RS232/485 card is galvanic isolated.
Fig. 46 Mounting frame for the control panel
10.2 Parameter sets
Communication information for the different parameter
sets.
The different parameter sets in the VSD have the following
DeviceNet instance numbers and Profibus slot/
index numbers:
Parameter
set
Modbus/DeviceNet
Instance number
Profibus
Slot/Index
A 43001–43556 168/160 to 170/205
B 44001–44529 172/140 to 174/185
C 45001–45529 176/120 to 178/165
D 46001–46529 180/100 to 182/145
Parameter set A contains parameters 43001 to
43556. The parameter sets B, C and D contains the
same type of information. For example parameter
43123 in parameter set A contain the same type of
information as 44123 in parameter set B.
A DeviceNet instance number can easily be converted
into a Profibus slot/index number according to
description in section section 11.8.2, page 153.
10.3 Motor data
Communication information for the different motors.
Note that the control panel RS232 connection can
safely be used in combination with commercial available
isolated USB to RS232 converters.
Motor
Modbus/DeviceNet
Instance number
Profibus
Slot/Index
M1 43041–43048 168/200 to 168/207
Omron SX inverter manual Serial communication 53