Diamond 10kW Manual
Dynatronix, Inc.
198-1603-03 Rev 01
Page 63 of 150
7. Remote Host Control
7.1. Overview
The power supply can be controlled by a host (computer, plc, etc) using the RS485 serial host port
and the ASCII host protocol defined in
0Appendix B:
Host Port Protocol
.
The host port can be used
to monitor the settings or read back values at any time. The host port can only modify settings if
the unit is in Remote mode (RMT indicator is on). The Remote mode is entered by pressing the
Rem
ote switch or changing the “control type” parameter in the
Unit
Settings Command “t”:
.
7.2. Host Port Communications Settings
The host port settings include a Unit ID (1 to 99), a Baud Rate (9600, 19200, 38400, 57600,
115200), and a configurable host communication watchdog timer (WDT) timeout. If more than
one power supply is connected on a multi-drop network each power supply must have a unique
unit ID so that it can be individually addressed.
The host port ID and baud rate are displayed momentarily at power up after the version
information is displayed. The host port ID is displayed on the top display and the baud rate is
displayed in kilobits per second on the bottom display. The following would be displayed for a unit
having an ID of 01 and baud rate of 115200.
The host port WDT timeout can be used to disable the power supply output in the event that host
port communications fail. If valid host communication is not received within the WDT timeout
period a fault is set and the power supply output is disabled. The host port WDT can be disabled
by setting the timeout value to zero.
The host configuration be set using the host port protocol as defined in the
Unit Settings
Command “t”:
or from the unit configuration menu by using the power supply front panel with the
instructions in
6.3
.
Unit Configuration
and
6.3.2
.
Host Port Configuration
.
7.3. Host Port Connections
See the
5.5: Serial Host Port Connections
for the host port connection diagram.
7.4. Host Port Protocol
An ASCII based protocol provides access to all power supply settings for complete power supply
control through the host port connection. Multiple power supplies on a multi-drop RS485 network
can be individually addressed. See
0 Appendix B:
Host Port Protocol
for details.
.
.