YASKAWA MP920 User Manual page 210

8 Example Communications Module Applications
8.3.4 MELSEC Settings (AJ71UC24 Example)
Switch Settings
Station Number Setting Switches
Set 01 to 31, but not 0. (Recommended value: 01)
Switch Name
× 10 (rotary switches 0 to 9)
× 1 (rotary switches 0 to 9)
Communications Specification Setting Switches (For AJ71UC24 Mod-
ules)
Switch Name Setting Item
SW11 Main channel setting
SW12 Data bit setting
SW13 Transmission Speed set-
ting
SW14
SW15
SW16
Parity bit setting
SW17 Even parity
Odd parity
SW18 Stop bit setting
SW21 Checksum setting
SW22 Write enable/disable set-
ting during RUN
SW23 Computer link
Multi-drop
SW24 Not used.
Note: The shaded parts show setting examples.
* 1. The following table shows the settings of switches 13, 14 and 15.
bps 300
OFF
SW13
OFF
SW14
OFF
SW15
* 2. With the AJ71C24-S8, the terminating resistance ON/OFF setting on
the transmission side depends on the wiring.
* 3. With the AJ71C24-S8, the terminating resistance ON/OFF setting on
the reception side depends on the wiring.
Setting
The second digit for station
number
The first digit for station
number
Setting Contents
ON
RS-422
8 bits
See the following table.
Yes
Even
2 bits
Yes
Enabled
Computer link
-
600 1,200
ON OFF
OFF ON
OFF OFF
8-20
Set Value
(Recommended Value)
0
1
Value
OFF
RS-232C
7 bits
*1
No
Odd
1 bit
No
Disabled
Multi-drop link
ON
-
OFF
2,400 4,800 9,600
ON OFF ON
ON OFF OFF
OFF ON ON
Set
OFF
ON
OFF
ON
ON
ON
ON
OFF
ON
ON
*2
*3
19,200
OFF
ON
ON