Modbus Rtu Communications; Introduction; Modbus Rtu Specification; Rj45 Connector Configuration - SODECA VSD1/A-RFM-0.5 Manual De Instalación Y Operación

Diagram 13
(NO) (NC) (NO)
Close Open Close
FWD Stop REV

8. Modbus RTU Communications

8.1. Introduction

The VSD can be connected to a Modbus RTU network via the RJ45 connector on the front of the drive.

8.2. Modbus RTU Specification

Protocol
Error check
Baud rate
Data format
Physical signal
User interface
Supported Function
Codes

8.3. RJ45 Connector Configuration

For full MODBUS RTU register map information
When using MODBUS control the Analog and
Digital Inputs can be configured as shown in

8.4. Modbus Register Map

Par.
Register
Type
Number
1 - R/W
2 - R/W
4 - R/W
6 - R
7
R
8 R
11 - R
20 P00-01 R
Diagram 14
Modbus RTU
CRC
9600bps, 19200bps, 38400bps, 57600bps, 115200bps (default)
1 start bit, 8 data bits, 1 stop bits, no parity.
RS 485 (2-wire)
RJ45
03 Read Multiple Holding Registers
06 Write Single Holding Register
16 Write Multiple Holding Registers (Supported for registers 1 – 4 only)
please refer to your dealer.
section 0
Supported
Function Function
Codes
03 06 16 Low Byte
   Drive Control Command
   Modbus Speed reference setpoint
   Acceleration and Deceleration Time
 Error code

Output Motor Frequency
 Output Motor Current
 Digital input status
 Analog Input 1 value
Diagram 15
P-47=
0-10V
4-20mA 4-20mA
Range Explanation
High Byte
0..3 16 Bit Word.
Bit 0 : Low = Stop, High = Run Enable
Bit 1 : Low = Decel Ramp 1 (P-04), High = Decel
Ramp 2 (P-24)
Bit 2 : Low = No Function, High = Fault Reset
Bit 3 : Low – No Function, High = Coast Stop
Request
0..5000 Setpoint frequency x10, e.g. 100 = 10.0Hz
0..60000 Ramp time in seconds x 100, e.g. 250 = 2.5 seconds
Drive status Low Byte = Drive Error Code, see section 10.1
High Byte = Drive Status as follows :-
0 : Drive Stopped
1: Drive Running
2: Drive Tripped
0..20000
Output frequency in Hz x10, e.g. 100 = 10.0Hz
0..480 Output Motor Current in Amps x10, e.g. 10 = 1.0 Amps
0..15 Indicates the status of the 4 digital inputs
Lowest Bit = 1 Input 1
0..1000 Analog input % of full scale x10, e.g. 1000 = 100%
26
Diagram 16
Open
P-16=
0-10V
1 CAN -
2 CAN +
3 0 Volts
4 -RS485 (PC)
5 +RS485 (PC)
6 +24 Volt
7 -RS485 (Modbus RTU)
8 +RS485 (Modbus RTU)
Warning:
This is not an Ethernet
connection. Do not connect
directly to an Ethernet port.
(NC) P-16=
0-10V
Trip 4-20mA