Yokogawa JUXTA ML2 - Manual (Page 4)

4 IM 77J04L02-01E 1st Edition Sep.10, 2004-00
10. SWITCH SETTING
This converter has the following five setting elements.
Communication speed (Baud rate)
Selection of 2-wire/4-wire
Selection of Auto/Manual of RS-485 driver active
Selection of with/without the terminating resistor
Selection of On/Off of echo back function
10.1 Setting Each Section
Setting of Rotary Switch
Set the rotary switch according to communication speed.
The table below shows switch position corresponding to commu-
nication speed (bps). When shipping from the factory, the rotary
switch position is set to 5.
No.
0
1
2
3
4
5
6
7
Transmit
Speed (bps)
300
600
1200
2400
4800
9600
19200
38400
Timer
(ms)
33.3
16.7
8.33
4.17
2.08
1.04
0.52
0.26
Setting of Rotary Switch
Setting of DIP Switches (No.1 to No.6)
No.1 and No.2: Select 2-wire or 4-wire. (Factory-set default: On, 2-
wire)
No.3: Selects Auto/Manual of RS-485 driver active. (Factory-set de-
fault: Off, Auto)
Set the circuit that controls RS-485 driver active. Select Auto or
Manual according to the communication program of host device
connected with RS-232C connector.
No.4: Select with or without the terminating resistor. (Factory-set de-
fault: On)
When this converter is in the terminus of RS-485 line, set it to On
so as that the terminating resistor would become effective. In
most cases, the converter is used as terminus. However, if not,
set it to Off.
No.5: Select On/Off of echo back. (Factory-set default: Off)
If used for 4-wire, be sure to set the switch to Off.
No.6: Be sure to set the switch to Off.
No.
1
2
3
4
5
6
Setting ON
2-wire
Manual
With
ON
-
4-wire
Auto
Without
OFF
OFF
2-wire/4-wire
Driver active
Terminating resistor
Echo back
Fixed to OFF
OFF
Setting of DIP Switch