Delta VFD-L-I Series, User Manual

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Chapter 4 Parameters
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VFD-L-I Series
4-50 Revision July 2009, SW V1.1
This setting is only valid in ASCII mode. If this function is enabled, time interval between
characters can’t exceed 500ms.
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 ASCII mode, protocol <8,N,2>
4 Modbus ASCII mode, protocol <8,E,1>
5 Modbus ASCII mode, protocol <8,O,1>
6 Modbus RTU mode, protocol <8,N,2>
7 Modbus RTU mode, protocol <8,E,1>
8 Modbus RTU mode, protocol <8,O,1>
1. Computer Control
6
1
1: +E V
2: G ND
3: SG -
4: SG +
P in s 1 & 2 a re use d fo r th e p owe r o f di gi tal key pa d.
P le ase do no t use it d ur in g RS -4 85 commu ni ca tio n.
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There is a built-in RS-485 serial interface, marked (RJ-11) on the control terminal
block, for VFD-L-I Series. The pins are defined above. Each VFD-L-I AC drive has a
pre-assigned communication address specified by Pr.09-00. The computer then
controls each AC drive according to its communication address.
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VFD-L-I can be set 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.09-04.
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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