TDK-Lambda Genesys - Communication Interface Protocol

80
83532002 Rev C
8.4.2. Multi Power Supply Connection to RS-232 or RS-485 Bus
Up to 31 units (0 - 30) can be connected to the the RS-232 or RS-485 Digital
communication bus. The first unit connects to the controller via RS-232 or RS-485 (J3-IN)
and the other units are connected with the RS-485 bus.
a) First unit connection: Refer to Section 8.4.1 for connecting the first unit to the
controller.
b) Remaining units connection: The remaining units on the Digital communication bus
are connected via their RS-485 interface.
Refer to Figure 8-5 for typical unit-to-unit connections.
 Set the rear panel setup switch SW1-6 to its UP position (RS-485).
 Using the “Linking” cable (Refer to Fig. 8-6), connect each unit J3-OUT
connector to the next unit J3-IN connector.
8.5. Communication Interface Protocol
8.5.1. Data format
Serial data format is 8 bit, one start bit and one stop bit. No parity bit.
NOTE
The address (“ADR n”) command must return an “OK” response before any other
commands are accepted.
8.5.2. Addressing
The Address is sent separately from the command. It is recommended to add a 100msec
delay between a queries or sent command to next unit addressing. Refer to Section
8.7.3 for details.
8.5.3. End of Message
The end of message is the Carriage Return character (ASCII 13). The Power Supply
ignores the Line Feed (ASCII 10) character.
8.5.4. Command Repeat
The backslash character “\” will cause the last command to be repeated.
IN OUT
POWER SUPPLY
#1
IN
OUT
POWER SUPPLY
#2
IN OUT
POWER SUPPLY
#3
IN
OUT
POWER SUPPLY
#31
RS232/RS485
RS485 RS485
RS485
Fig 8-5: Multiple power supply RS-232/RS-485 connection
8
1
1
8
1
6
3
5
4
1
6
3
5
4
PIN NO.
HOUSING HOUSING
PIN NO.NAME
NAME
SHIELD
SG
TXD
TXD
RXD
RXD
SHIELD
SG
RXD
RXD
TXD
TXD
-
+
+
+
+
-
-
-
Fig.8-6: Serial Link Cable with RJ-45 shielded connectors (P/N: GEN/RJ-45)
L=0.5m typ.