Delta Electronics VFD-S manual 9-03, 1 +EV 2 GND 3 SG- 4 SG+

Chapter 5 ParametersVFD-S Series

9-03	Time-out Detection
				Factory Setting: d0
	Settings	d0	Disable
		d1~d20	1~20 sec

If this function is enabled, the timer will start counting once the first valid Modbus

communication signal is received after power-up or reset. The timer will reset to 0 after each

valid Modbus communication message is received. If the watchdog timer reaches the value

set in Pr. 9-03, the drive will stop its output and display the message "CE10" on the digital

keypad. This fault can reset by an external terminal, keypad or a Modbus communication

reset command.

9-04Communication Protocol

Factory Setting: d0

Settings	d0	Modbus ASCII mode, protocol <7,N,2>
	d1	Modbus ASCII mode, protocol <7,E,1>
	d2	Modbus ASCII mode, protocol <7,O,1>
	d3	Modbus ASCII mode, protocol <8,N,2>
	d4	Modbus ASCII mode, protocol <8,E,1>
	d5	Modbus ASCII mode, protocol <8,O,1>
	d6	Modbus RTU mode, protocol <8,N,2>
	d7	Modbus RTU mode, protocol <8,E,1>
	d8	Modbus RTU mode, protocol <8,O,1>

1. Computer Control

1: +EV 2: GND 3: SG- 4: SG+

6 1

There is a built-in RS-485 serial interface, marked (RJ-11 Jack) on the control terminal block, for VFD-S Series. The pins are defined above. Each VFD-S AC drive has a pre- assigned communication address specified by Pr. 9-00. The computer then controls each AC drive according to its communication address.

VFD-S can be setup 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. 9-04.

Revision August 2008, SE09, SW V2.61 5-63