Delta Electronics VFD-M User Manual

Page 105

Chapter 4 Parameters|

4-70

Revision May 2008, ME14, SW V3.04

Content Address

Functions

2106H

Output Voltage E (XXX.X)

2107H

Step number of Multi-Step Speed Operation (step)

2108H

Time of PLC Operation (sec)

2109H

Value of External Trigger (count)

210AH

The Correspondent Value of Power Factor (XXX.X)

210BH

Pr.65 X Low word of H (XXX.XX)

210CH

Pr.65 X High word of H (XXX.XX)

210DH

AC Drive Temperature (XXX.X)

210EH

PID Feedback Signal (XXX.XX)

210FH

PID Target Value (XXX.XX)

2110H

AC Drive Mode Type Information

3.7 Communication program of PC:

The following is a simple example of how to write a communication program for Modbus ASCII

mode on a PC by C language.

#include

#define PORT 0x03F8 /* the address of COM1 */

/* the address offset value relative to COM1 */

#define THR 0x0000

#define RDR 0x0000

#define BRDL 0x0000

#define IER 0x0001

#define BRDH 0x0001

#define LCR 0x0003

#define MCR 0x0004

#define LSR 0x0005

#define MSR 0x0006

unsigned char rdat[60];

/* read 2 data from address 2102H of AC drive with address 1 */

unsigned char tdat[60]={':','0','1','0','3','2','1','0',’2', '0','0','0','2','D','7','\r','\n'};