CHAPTER 7
RS232 & RS485 REMOTE CONTROL
7.1 INTRODUCTION
7.2 CONFIGURATION
This chapter describes the operation of the Genesys
750W and 1500W power supplies via the
serial communication port. Details of the initial set-up, operation via RS232 or RS485, the command
set and the communication protocol are described in this chapter.
The power supply is shipped with the following setting:
TM
7.2.1 Default setting
6
9600
RS232
0
Maximum
H1(Master)
-Output:
-Start up mode:
-OVP:
-UVL:
-Foldback:
-Front panel:
Off
Safe start
Maximum
0
Off
Unlocked (UFP)
7.2.2 Address setting
7.2.3 RS232 or RS485 selection
7.2.4 Baud rate setting
7.2.5 Setting the unit into Remote or Local mode
The power supply address can be set to any address between 0 and 30. Follow the instructions
described below to set the address.
1. If the unit is in Remote mode (front panel REM/LOC LED illuminates), press REM/LOC
button to put the unit into Local mode.
2. Press and hold for approximately 3sec. the REM/LOC button. The VOLTAGE display will
indicate the communication port address.
3. Using the VOLTAGE adjust encoder, select the address.
To preview the address at any time, press and hold the REM/LOC button for approx. 3sec. The
VOLTAGE display will indicate the power supply address.
To select between RS232 or RS485 set the rear panel setup switch SW1-6 position to:
- Down for RS232
- Up for RS485
Five optional rates are possible: 1200, 2400, 4800, 9600 and 19200. To select the desired rate,
the following steps should be taken:
1. If the unit is in Remote mode (front panel REM/LOC LED illuminates), press REM/LOC
button to put the unit into Local mode.
2. Press and hold for approx. 3sec. the REM/LOC button. The CURRENT display will show
the communication port Baud Rate.
3. Using the CURRENT adjust encoder, select the desired Baud Rate.
1. The unit will be put into Remote mode only via serial communication command.
Commands that will put the unit into Remote mode are:
RST
PV n
OUT n
PC n
RMT n
(for n values see Tables 7-3, 7-4 and 7-5)
48
-Address:
-Baud-rate:
-RS232/485:
-Vout setting:
-Iout setting:
-Master/Slave
2. There are two Remote modes:
1. Remote:
2. Local Lockout:
In this mode, return to local can be made by the front panel REM/LOC or via
serial port command RMT 0. Set the unit into Remote mode via serial port
RMT 1 command.
In this mode the unit can be returned to Remote mode via the serial port
RMT 1 command or by turning off the AC power until the display turns off
and then turn it to on again. In Local Lockout mode, the front panel
REM/LOC button is not active. Set the unit into Local Lockout mode via
serial port RMT 2 command.
7.2.6 RS232/485 port in Local mode
7.2.7 Front panel in Remote mode
When the power supply is in local mode, it can receive queries or commands. If a query is received,
the power supply will reply and remain in Local mode. If a command that affects the output is
received, the power supply will perform the command and change to Remote mode.
Serial commands may be sent to set the status registers and read them while the unit is in Local
mode. If the Enable registers are set (refer to section 7.8) the power supply will transmit SRQ’s while
in Local.
Front panel control in Remote mode is disabled except for:
1. PREV: use to preview the Voltage and Current limit setting.
2. OVP/UVL: use to preview the OVP/UVL setting.
3. LOC/REM: use to set the unit into Local mode.
In Local Lockout mode, only PREV and OVP/UVL are active.
The RS232/485 interface is accessible through the rear panel RS232/485 IN and RS485 OUT
connectors. The connectors are 8 contact RJ-45. The IN and OUT connectors are used to connect
power supplies in a RS232 or RS485 chain to a controller. Refer to Fig.7-1 for IN/OUT connectors
7.3 REAR PANEL RS232/485 CONNECTOR
Tx and Rx are used for RS232 communication. Txd +/- and Rxd +/- are used for RS485
communication. Refer to RS232 and RS485 cables description for connection details.
49
NOTE
NC
NC
RX
NC
NC
TXD
RXD
TXD
RXD
RXD
TXD
RXD
TXD
SG
SG
-
-
-
-
+
+
+
+
TX
OUT
IN
Fig.7-1: J3 rear panel IN/OUT connectors pinout
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
Shield
(connector enclosure)
48
Summary of Contents for Genesys GENH6-100
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