Chapter 4 Parameters
4-136
NOTE
The digital keypad is optional. Please refer to Appendix B for details. When using without this optional
keypad, the FAULT LED will be ON once there is fault messages or warning messages from the
external terminals.
09.03
Time-out Detection
Unit: second
Settings
0.0 to 120.0 sec
Factory Setting: 0.0
0.0
Disable
If Pr.09.03 is not equal to 0.0, Pr.09.02=0~2, and there is no communication on the bus during
the Time Out detection period (set by Pr.09.03), “cE10” will be shown on the keypad.
09.04
Communication Protocol
Factory Setting: 0
Settings
0
Modbus
ASCII
mode, protocol <7,N,2>
1
Modbus ASCII mode, protocol <7,E,1>
2
Modbus ASCII mode, protocol <7,O,1>
3
Modbus RTU mode, protocol <8,N,2>
4
Modbus RTU mode, protocol <8,E,1>
5
Modbus RTU mode, protocol <8,O,1>
6
Modbus RTU mode, protocol <8,N,1>
7
Modbus RTU mode, protocol <8,E,2>
8
Modbus RTU mode, protocol <8,O,2>
9
Modbus ASCII mode, protocol <7,N,1>
10
Modbus ASCII mode, protocol <7,E,2>
11
Modbus ASCII mode, protocol <7,O,2>
1. Control by PC or PLC
A VFD-E can be set up to communicate in Modbus networks using one of the following
modes: ASCII (American Standard Code for Information Interchange) or RTU (Remote
Terminal Unit). Users can select the desired mode along with the serial port communication
protocol in Pr.09.04.
Code Description:
The CPU will be about 1 second delay when using communication reset. Therefore, there is
at least 1 second delay time in master station.
ASCII mode:
Each 8-bit data is the combination of two ASCII characters. For example, a 1-byte data:
64 Hex, shown as ‘64’ in ASCII, consists of ‘6’ (36Hex) and ‘4’ (34Hex).
Character ‘0’ ‘1’ ‘2’ ‘3’ ‘4’ ‘5’ ‘6’ ‘7’
ASCII
code 30H 31H 32H 33H 34H 35H 36H 37H
