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5.3 Control Circuit Wiring
Main Circuit Power Supply
OFF
■
Serial Communication Terminals
Refer to
Table 5.6
for a list of serial communication terminals and functions.
Type
Terminal
Modbus Communication
◆
Control Circuit Terminal Configuration
The control circuit terminals are in the positions shown in
A - Terminal block (TB2)
B - Terminal block (TB1-1)
◆
Switches and Jumpers on the Terminal Board
The terminal board has switches to adapt the drive I/Os to the external control signals as shown in
Set the switches to select the functions for each terminal.
506
External 24 V Power Supply
ON
Table 5.6 Serial Communication Terminals
Terminal Name
D+
Communication input/output (+)
D-
Communication output (-)
AC
Shield ground
Figure 5.3 Control Circuit Terminal Arrangement
o2-23
[External 24V Powerloss
[Alarm Display at Ext. 24V
Detection]
-
-
MEMOBUS/Modbus communications
Use an RS-485 cable to connect the drive.
Note:
Set DIP switch S2 to ON to enable the
termination resistor in the last drive in
a MEMOBUS/Modbus network.
0 V
Figure
5.3.
C - Terminal block (TB1-2)
D - Terminal block (TB1-3)
YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
o2-26
Alarm Display
Power]
"Ready" LED light flashes quickly
0 [Disabled]
1 [Enabled]
EP24v [External Power 24V
Supply]
Function (Signal Level)
• RS-485
• MEMOBUS/Modbus communication
protocol
• Maximum 115.2 kbps
Figure
5.4.
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