User Manual

9.179 ET-ADH-2A

This page describes the device driver and the device window for the Environmental Technology ADH-2A waveguide pressurizer / dehydrator. The device driver for this device operates read only, there are no setting which can be made.

Device window pages

The following table shows which device window pages are available with this individual device type. Tool-bar functions not mentioned here are described at the general description of device windows .

--- Displays meter readings like device state, pressure and temperature.
--- The faults page.
--- The device info page.
--- The maintenance page. The configuration parameters described below are set at this page.

Configuration parameters

At the maintenance page of the device window there are a couple of configuration parameters which must be set to make the software talk to the device.

parameter	description
address	The device address (decimal). The factory default is 48
Serial	Remember to set the line parameters for the serial interface connected to the TWTA. The factory default of the dehydrator is 9600,7,E,1 .

Remarks

The ADH-2A uses a RS422 serial interface, you will need a RS232 to RS422 converter to control the device from a standard RS232 port.

There are a couple of jumpers / switches inside the device (please refer to the ADH-2A operation manual). The driver expects the following settings:

Device address 0x30 (48 decimal)
baud rate 9600 (you may use 1200 as well if you configure the VLC/M&C to the same baud rate, but this will slow down the communication significantly.)
Metric display. If the device is configured to english display, readings will be in °F , psi etc. but the sat-nms software will still append metric units to the reading.

The ADH-2A operation manual also describes a redundant configuration of two ADH-2A units, connected through their RS422 ports. The sat-nms software is not capable to monitor the ADH-2A in this configuration.

Variables defined by this device driver

name	type	flags	range
info.driver	TEXT	R/O	StringRange R/O
lowLevel.cmd	TEXT		StringRange
lowLevel.reply	TEXT	R/O	StringRange R/O
faults.99	ALARM	R/O	AlarmFlagRange R/O (Communication)
faults.commstat	TEXT	R/O	StringRange R/O
info.type	TEXT	R/O	StringRange R/O
info.port	TEXT	R/O	StringRange R/O
info.frame	TEXT	R/O	StringRange R/O
info.revision	TEXT	R/O	StringRange R/O
internal.s	TEXT	R/O	StringRange R/O
internal.p	INTEGER	R/O	IntegerRange R/O (0 .. 0)
internal.t	INTEGER	R/O	IntegerRange R/O (0 .. 0)
pressure	FLOAT	R/O	DoubleRange R/O (0.0 .. 0.0)
pressure2	FLOAT	R/O	DoubleRange R/O (0.00 .. 0.00)
temperature	FLOAT	R/O	DoubleRange R/O (0 .. 0)
temperature2	INTEGER	R/O	IntegerRange R/O (0 .. 0)
absorptionUnit1	CHOICE	R/O	EnumRange R/O (IDLE ACTIVE REGENERATING FULL DEAD LEAKY STANDBY)
absorptionUnit2	CHOICE	R/O	EnumRange R/O (IDLE ACTIVE REGENERATING FULL DEAD LEAKY STANDBY)
dutyCycle	INTEGER	R/O	IntegerRange R/O (0 .. 0)
flowRate	FLOAT	R/O	DoubleRange R/O (0.00 .. 0.00)
faults.01	ALARM	R/O	AlarmFlagRange R/O (Low pressure)
faults.02	ALARM	R/O	AlarmFlagRange R/O (High pressure)
faults.03	ALARM	R/O	AlarmFlagRange R/O (System leaky)
faults.04	ALARM	R/O	AlarmFlagRange R/O (High temperature)
faults.05	ALARM	R/O	AlarmFlagRange R/O (Low temperature)
faults.06	ALARM	R/O	AlarmFlagRange R/O (Low line voltage)
faults.07	ALARM	R/O	AlarmFlagRange R/O (AU#1 heat)
faults.08	ALARM	R/O	AlarmFlagRange R/O (AU#1 cool)
faults.09	ALARM	R/O	AlarmFlagRange R/O (AU#2 heat)
faults.10	ALARM	R/O	AlarmFlagRange R/O (AU#2 cool)
faults.11	ALARM	R/O	AlarmFlagRange R/O (Leaky shutdown)
faults.12	ALARM	R/O	AlarmFlagRange R/O (Dew point)
faults.13	ALARM	R/O	AlarmFlagRange R/O (Change compressor)