Chapter 5 Parameters|VFD-M-D Series
Revision Jan. 2007, MDE2, SW V1.05 5-73
8 - 03 Time-out Detection Unit: 0.1
Settings 0.0 ~ 60.0 sec Factory Setting: 0.0
0.0 Disable
If Pr.8-03 is not equal to 0.0, Pr.8-02=00~02, and there is no communication on the bus during
the Time Out detection period (set by Pr.8-03), “cE10” will be shown on the keypad.
8 - 04 Communication Protocol
Factory Setting: 00
Settings 00 Modbus ASCII mode, protocol <7,N,2>
01 Modbus ASCII mode, protocol <7,E,1>
02 Modbus ASCII mode, protocol <7,O,1>
03 Modbus RTU mode, protocol <8,N,2>
04 Modbus RTU mode, protocol <8,E,1>
05 Modbus RTU mode, protocol <8,O,1>
1. Control by PC or PLC
A VFD-M-D can be set up to communicate on 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.8-04.
Code Description:
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
Character ‘8’ ‘9’ ‘A’ ‘B’ ‘C’ ‘D’ ‘E’ ‘F’
ASCII code 38H 39H 41H 42H 43H 44H 45H 46H
RTU mode:
Each 8-bit data is the combination of two 4-bit hexadecimal characters. For example, 64
Hex.
2. Data Format
10-bit character frame (For ASCII):
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