Define Instruments TEX-DEW200 Operating Manual

Download

TEX-DEW200

Humidity/Temperature

Order Codes

TEX-DEW200 Humidity/Temperature with 2 x 4–20mA analog outputs

–HV –LV

Options

–R2 –R4 –S2R 1 x RS232 (RJ11 terminal) –S4S 1 x RS485 (screw terminal)

85–265V AC / 95–370V DC

15–48V AC / 10–72V DC

2 x relay outputs

4 x relay outputs

The TEX-DEW200 has been designed for

wet/dry bulb relative humidity applica-

tions, and accepts RTD 385/392 PT100

inputs.

It features dual 4–20mA analog output

for humidity and temperature, and a

dual display for simultaneous viewing of

these variables.

The TEX-DEW200 has been designed for

ease of use, with scrolling text prompts

that guide you step-by-step through the

setup process.

Contents

1 - Specications ............................. 2

2 - Front Panel & Display .................. 3

3 - Wiring ......................................... 4

4 - Dimensions & Installation ......... 7

5 - Input Setup & Calibration ......... 9

6 - Setpoint Setup ........................... 16

7 - Setpoint Open Access ................ 18

8 - Reset PIN Numbers / View

Firmware Version ...................... 19

A - Appendix A - Serial Modes ........ 20

SPECIFICATIONS

Input

Sensor input 1 x wet bulb, 1 x dry bulb.

Dual 3-wire RTD (385/392), PT100

Power supply HV= 85–265V AC / 95–

370V DC, or LV= 15–48V AC / 10–72V DC

Excitation 24V DC (50mA max)

Sampling rate 2.5Hz

Resolution 0.025% full scale, 16 bit

Accuracy 0.05% of reading

Ambient dri 50ppm/°C typical

Temperature units °F or °C

Noise rejection 50/60Hz

Analog Output

Number of analog outputs 2

Analog output type Isolated 16 bit

4–20mA

Serial port options Isolated RS232 (RJ

terminal) or RS485 (screw terminal)

Programming

Front panel buttons Up, Down, P (Prog/

Enter), plus 2 Menu buttons (F)

Factory calibration 385 RTD, 0–100°C

(32–212°F)

Security Input and setpoint setups

are independently accessible and PIN

protected

Display

Display type LED display, 5 buttons

LED indicators 6 setpoint indicator LED's

Digits 2 rows of 6 digits, 10mm (0.4"), 14

segment alphanumeric LED

Display range 0.1 to 99999.9

Relay Output

Number of relay outputs None, 2, or 4

Relay output type 5A form A (3A 240V

AC max or 3A 30V DC max)

Comm Port

Number of serial ports None or 1

OPTIONAL

Construction

Casing Panel mount case

Ingress protection rating IP65 dust/

splash proof (face only)

Dimensions (H x W x D)

48 x 96 x 120mm (1.89 x 3.78 x 4.72")

Panel cutout 45 x 92mm (1.77 x 3.62")

FRONT PANEL & DISPLAY

2.1 - Front panel

The SP LED's are used to

indicate active setpoints.

This button is used to ac-

cess the Input Setup & Calibra- tion menu (Section 5).

This button is used to save

your settings and advance to the next step in the setup process.

This button is typically used to scroll through options or increase values in the

setup menu. Pressing this button from the main display will allow you to view/reset

the Peak value (see 2.3).

This button is typically used to scroll through options or decrease values in the

setup menu. Pressing this button from the main display will allow you to view/reset

the Valley value (see 2.3).

48mm

(1.89")

96mm (3.78")

This button is used to access the Setpoint Setup menu (Section 6) and the Set-

point Open Access menu (Section 7).

2.2 - Display brightness

To adjust the display brightness, press the and buttons together from the main display. BRI appears and toggles with the current setting. Use the and

buttons to adjust the LED backlight, and then press to nish.

2.3 - Up and down button shortcuts

Pressing the and buttons from the main operational display allows instant

access to 'Peak' and 'Valley' values, which are held in the controller's memory.

› PEAK is the maximum measured value since the instrument was turned on

or reset, and this value can be viewed by pressing the

operational display.

› VALLEY is the minimum measured value since the instrument was turned on

or reset, and this value can be viewed by pressing the

operational display.

› Press at any time to return to normal operating mode.

button from the

'Peak' or 'Valley' can be reset to zero by pressing the

time while the desired variable is being displayed, or by using the input pins (3.6).

BEFORE YOU BEGIN WIRING, ensure that the unit is switched o and the power supply is disconnected.

WIRING

and buttons at the same

3.1 - Pinouts

A B C

Key

3.1A Relay Output (See 3.4)

3.1B Serial Port (See 3.5)

3.1C Analog Output (See 3.3)

3.1D Analog Input (See 3.2)

3.1E Function Pins (See 3.6)

3.1F Power Supply HV/LV

D E F

(See 3.7)

3.2 - Wire the analog input module

(Dry bulb)

(Wet bulb)

See 3.1D

Wire your analog input module, referring to the diagram

(right).

ROOM

TEMP

PT100

WET TEMP

PT100

3.3 - Wire the analog output

See 3.1C

Wire your dual 4–20mA analog outputs as shown, if required for your

application.

–ADI

RM TMP

COM

R.H.

3.4 - Wire the relay outputs (if installed) See 3.1A

If your controller has relay outputs tted, wire them as shown below. Relays can be

programmed to operate within the total span range of the controller.

–R2

SP2 SP1

–R4

SP3SP4 SP1SP2

Valley Tes tHold

Peak

3.5 - Wire the serial port (if installed)

–S2R

–S4S

See 3.1B

If your controller has serial port tted, wire it as

shown in the applicable diagram.

› S2R: RS232, RJ11 terminal

N/C

D -D +

SGND

N/C

SGND

+5V DC (option)

RXD

TXD

› S4S: RS485, screw terminal

3.6 - Wire the function pins See 3.1E

Connect external switches as shown to enable a

function to be executed when its switch is activated.

› Valley Clears the Valley reading (also see 2.3) › Hold Holds the current display value › Test Resets the meter › Peak Clears the Peak reading (also see 2.3)

COM

3.7 - Wire the power supply See 3.1F

DO NOT connect your low voltage controller to mains power.

Wire the power supply as shown

below. Compare the label on

the unit with the connector:

› Orange = HV (85–265V AC,

95–370V DC)

High voltage (HV)

+DC

Live

−DC

Neutral AC

Low voltage (LV)

+DC

Live

› Black = LV (15–48V AC,

10–72V DC)

HV power

supply

Once you have completed the

wiring process it is safe to switch

on your power supply. Ensure that your display is functioning before you proceed.

LV power

supply

−DC

Neutral AC

120

155mm (6.10") minimum depth required behind panel

DIMENSIONS & INSTALLATION

4.1 - Case dimensions

mm (0.16")

92mm

(3.78")

(3.62")

mm (4.72")

mm (1.54")

Cabling Allowance

155mm (6.10") minimum depth required behind panel

(1.89")

120 mm (4.72") 39mm (1.54")

mm (0.16")

45mm

(1.77")

Cabling Allowance

Panel Meter Faceplate

Panel Cutout

4.2 - Installation instructions

A Prepare the Panel Cutout to

92 x 45mm ±.5 (3.62 x 1.77" ±.02),

as shown below.

Allow at least 155mm (6.10") depth behind the panel to accommodate the meter body, protruding connectors and cabling.

B Remove the Mounting Clips from

the meter back.

Panel Gasket

Mounting

Clips

Screws

C Slide the Panel Gasket over the

rear of the unit to the back of the

Meter Faceplate.

D From the front of the panel, insert

the meter into the Panel Cutout. Holding the unit in place, engage the Mounting Clips so that the tabs snap into place over the notches on the case.

E To achieve a proper seal, tighten

the Screws evenly until the unit sits rmly against the panel. Do not over-tighten the screws.

92mm ±.5

(3.62″ ±.02)

45mm ±.5

(1.77″ ±.02)

INPUT SETUP & CALIBRATION

5.1 - Enter Cal PIN number

A Enter the calibration mode by pressing the button.

_ _ _ ENTER CAL PIN NUMBER scrolls across the bottom row, and 0 appears

in the top row. Use the

default 1). Then press . If the correct PIN is entered, setup is started at 5.2.

If an incorrect PIN number is entered, _ _ _ _ INCORRECT PIN NUMBER – ACCESS DENIED scrolls across the display and it returns to normal operating

mode.

You will have the opportunity to change your PIN number at the end of this section (5.7). If you have forgotten your PIN number, see Section 8.

and buttons to enter your security code (factory

5.2 - Input setup

A _ _ _ INPUT SETUP scrolls across the bottom row, and SKIP appears in the top

row. Press to skip to 5.3, or the button and then to ENTER input

setup.

B _ _ _ MAINS FREQUENCY scrolls across the bottom row, and the current selec-

tion appears in the top row. Use the

and then press .

C _ _ _ SENSOR TYPE scrolls across the bottom row, and the currently selected

sensor type appears in the top row. Use the

RTD385 (default) or RTD392. Then press .

D _ _ _ SELECT TEMPERATURE SCALE scrolls across the bottom row, and the

currently selected temperature units appear in the top row. Use the buttons to select either DEG C (Celsius) or DEG F (Fahrenheit). Then press .

and buttons to select 50HZ or 60HZ,

and buttons to select either

and

E _ _ _ DISPLAY TEMPERATURE UNITS scrolls across the bottom row, and the

current selection appears in the top row. Use the and buttons to select either YES or NO, and then press .

If you select YES, then C or F (as selected in 5.2D) will appear aer the last digit

of the temperature value on the main display.

Note that activating this feature will eectively limit your temperature display range to 5 digits (9999.9), because the last character is used for the units.

F _ _ _ DISPLAY HUMIDITY UNITS scrolls across the bottom row, and the current

selection appears in the top row. Use the

and buttons to select either

YES or NO, and then press .

If you select YES, then the percent symbol (

%) will appear aer the last digit of

the humidity value on the main display.

5.3 - Calibration

Your TEX-DEW200 is factory calibrated for 0–100°C (32–212°F). In many cases you will not need to calibrate again.

A _ _ _ CALIBRATE scrolls across the bottom row, and SKIP appears in the top

row. Press channel to calibrate: RH (relative humidity), RM TMP (room temperature), or

WT TMP (wet bulb temperature). Press to continue.

¨ If you selected RM TMP or WT TMP, complete steps 5.3B–F now.

¨ If you selected RH, complete steps 5.3G–H now.

¨ If you selected SKIP, skip to 5.4 now.

Temperature calibration

B _ _ _ APPLY LOW INPUT AND WAIT FOR STABLE READING scrolls across the

bottom row, and the current input signal appears in the top row. Apply the low

input signal and wait for the reading to stabilise. Then press

If averaging has been applied to the selected channel (see 5.4), it may take 20–30 seconds or longer for the reading to stabilise.

now to skip to 5.4, or use the and buttons to select a

C _ _ _ ENTER LOW DISPLAY VALUE scrolls across the bottom row, and the cur-

rently selected low display value appears in the top row. Use the and

buttons to adjust the display value for the low level input signal as required, and

then press .

D _ _ _ APPLY HIGH INPUT AND WAIT FOR STABLE READING scrolls across the

bottom row, and the current input signal appears in the top row. Apply the high

input signal and wait for the reading to stabilise. Then press

If averaging has been applied to the selected channel (see 5.4), it may take 20–30 seconds or longer for the reading to stabilise.

E _ _ _ ENTER HIGH DISPLAY VALUE scrolls across the bottom row, and the cur-

rently selected high display value appears in the top row. Use the and

buttons to adjust the display value for the high level input signal as required,

and then press .

F If calibration was successful, the controller will exit the menu and resume nor-

mal operation, without showing any other scrolling messages. (To enter step

5.4, you must select SKIP at 5.3A.)

If calibration fails, _ _ _ CALIBRATION FAILED will scroll across the display and

you will be directed back to the operational display. The most likely cause of this

error is that the controller was unable to detect any change in input signal dur-

ing the calibration process. Check your signal and connections, and try again.

Humidity oset

G _ _ _ ENTER HUMIDITY OFFSET CORRECTION scrolls across the bottom row,

and the current oset value appears in the top row. This value can be set from

–20

% to +20%, to manually adjust the humidity display. Use the and but-

tons to adjust, if required, and then press .

H The controller will exit the calibration menu and resume normal operation.

(To enter step 5.4, you must select SKIP at 5.3A.)

Input signal in counts

Sampling

5.4 - Averaging

Your controller has input signal averag-

ing, optimising stable measurement.

If the change in input exceeds the

averaging window value it will not

average, ensuring fast response when

there are large dierences between

Input exceeds averaging window

Number

of samples

Averaging window in displayed counts

readings.

A _ _ _ AVERAGING SETUP scrolls across the bottom row, and SKIP appears in

the top row. Press to skip to 5.5, or use the and buttons to select a channel to congure: RH (relative humidity), RM TMP (room temperature), or

WT TMP (wet bulb temperature). Press to continue.

B _ _ _ AVE SAMPLES scrolls across the bottom row, and the current selection

appears in the top row. Using the

and buttons, alter the number of input

samples that the controller will average for the selected channel. Then press .

Increasing the number of samples will stabilise measurement, but it will also slow down response rates. A typical value is 4.

C _ _ _ AVE WINDOW scrolls across the bottom row, and the currently selected

averaging window value appears in the top row. Using the and buttons,

alter the signal averaging window for the selected channel. Then press .

If your input signal contains large noise spikes, you can increase the size of the averaging window to ensure that these are still averaged. However, increasing the window size too far will reduce the ability of the controller to respond quickly to real changes in input signal. Setting AVE WINDOW to 0 will give continuous averaging as per the selected averaging samples. A typical value is 10% of your system capacity.

D _ _ _ AVERAGING SETUP scrolls across the bottom row, and SKIP appears in

the top row. You are now back at 5.4A. Press now to skip to 5.5, or repeat

5.4A–D to congure averaging for a dierent channel.

5.5 - Analog output setup

N.B. All new units are calibrated before shipping. Recalibration is only necessary if settings are wiped or the unit's accuracy requires verication aer a long period of use. e.g. 1 year.

A _ _ _ ANALOGUE O/P SETUP scrolls across the bottom row, and SKIP appears

in the top row. Press to skip to 5.6, or use the and buttons to select an analog output channel to congure: either RH (relative humidity), or RM TMP

(room temperature). Press to continue.

B _ _ _ LOW SCALE VALUE FOR ANALOGUE O/P scrolls across the bottom row,

and the currently selected low scale display value appears in the top row. Use

and buttons to enter your cal low position, and then press .

the

C _ _ _ HIGH SCALE VALUE FOR ANALOGUE O/P scrolls across the display and

toggles with a calibration number shown in internal units (around 30000). Press

the

then press .

D _ _ _ CALIBRATE ANALOGUE O/P? scrolls across the bottom row, and SKIP ap-

pears in the top row. Use the

then press . You should not need to calibrate your output (see top)

or buttons, until the multimeter displays your target high output,

and buttons to select SKIP or ENTER, and

¨ If you selected SKIP, skip to 5.5G now.

¨ If you selected ENTER, connect a mA meter across the analog output

connector (see 3.3), and then continue to 5.5E.

E _ _ _ CAL LOW ANALOGUE O/P scrolls across the display and toggles with a

calibration number shown in internal units (around -16000). Press the

buttons until the multimeter displays your target low output (e.g. 4mA), then

press .

F _ _ _ CAL HIGH ANALOGUE OUTPUT scrolls across the display and toggles with

a calibration number shown in internal units (around 30000). Press the

buttons, until the multimeter displays your target high output, then press .

G _ _ _ ANALOGUE O/P SETUP scrolls across the bottom row, and SKIP appears

in the top row. You are now back at 5.5A. Press

now to skip to 5.6, or repeat

5.5A–G to set up another analog output channel.

5.6 - Serial setup

A _ _ _ SERIAL SETUP scrolls across the bottom row, and SKIP appears in the top

row. If your controller does not have a serial port installed, (or you do not wish

to congure your serial options now), please press to skip to 5.7.

Otherwise, press the

button and then to ENTER serial setup.

B _ _ _ SERIAL MODE scrolls across the bottom row, and the current serial mode

appears in the top row. Use the

and buttons to choose between: ASCII

(custom), MODBUS (RTU), or RNGR A (Ranger A). Then press .

ASCII is a simple custom protocol that allows connection to various PC conguration tools.

MODBUS is an industry standard RTU slave mode that allows connection to a wide range of

devices, such as PC’s or PLC’s.

RNGR A is a continuous output, used to drive remote displays and other instruments in the Rinstrum™ range. (Ranger is a trade name belonging to Rinstrum Pty Ltd.)

See Appendix A for more information about the available serial modes.

C _ _ _ BAUD RATE scrolls across the bottom row, and the current selection ap-

pears in the top row. Use the and buttons to select one of: 300, 600, 1200, 2400, 4800, 9600, 19200 or 38400. Then press

D _ _ _ PARITY scrolls across the bottom row, and the currently selected parity

appears in the top row. Using the

and buttons, select: NONE, ODD or

EVEN, and then press .

E _ _ _ SERIAL ADDRESS scrolls across the bottom row, and the currently selected

serial address appears in the top row. Use the

and buttons to alter the

serial address, and then press .

The serial address parameter is used to identify a particular device when it is used with other devices in a system. (It applies particularly to MODBUS mode when used on an RS485 serial network.) The serial address of the controller must be set to match the serial address dened in the master device.

Refer to Appendix A for more information on serial modes and registers.

5.7 - Edit Cal PIN number

A _ _ _ EDIT CAL PIN NUMBER scrolls across the bottom row, and SKIP appears

in the top row. Press to skip and return to the operational display, or the button and then to ENTER and change your PIN number.

B _ _ _ ENTER NEW CAL PIN scrolls across the bottom row, and the current PIN

(default 1) appears in the top row. Using the

new Cal PIN number. Then press to save and exit to the operational display.

and buttons, enter your

SETPOINT SETUP

6.1 - Enter SP PIN number

A Enter setpoint setup mode by pressing and holding the button for 3 seconds.

_ _ _ ENTER SP PIN NUMBER scrolls across the bottom row, and 0 appears in

the top row. Use the

default 1). Then press . If the correct PIN is entered, setup is started at 6.3.

If an incorrect PIN number is entered, _ _ _ _ INCORRECT PIN NUMBER – ACCESS DENIED scrolls across the display and it returns to normal operating

mode.

You will have the opportunity to change your PIN number at the end of this section (6.3). If you have forgotten your PIN number, see Section 8.

and buttons to enter your security code (factory

6.2 - Setpoint setup

The soware in your controller will allow you to congure up to 4 setpoints, however full functionality is only supported when relay output hardware installed.

(Setpoints with no corresponding relay output hardware may be used as simple LED indicators, if desired. In this case, features requiring relay output functionality will continue to appear in the setup menu, but will be ignored by the controller.)

A _ _ _ EDIT SETPOINT scrolls across the bottom row, and SKIP appears in the

top row. Press

setpoint to edit, and then press .

B _ _ _ SP VALUE scrolls across the bottom row, and the current value for the

selected setpoint appears in the top row. Using the

the display value at which the selected setpoint will activate, and then press .

The units for the SP VALUE will always correspond with your chosen SP SOURCE.

I.e. If you select 50.0% as your SP VALUE in this step, and then you choose RM TEMP as your SP SOURCE in 6.2C, your SP VALUE will be automatically changed to 50.0°C/F.

now to skip to 6.3, or use the and buttons to select a

and buttons, adjust

Energised Above

C _ _ _ SP SOURCE scrolls across the bottom row, and the current selection ap-

pears in the top row. Use the and buttons to select RH (relative humidity) or RM TMP (room temperature), and then press .

D _ _ _ SP ACTIVATION scrolls across the bottom row, and the activation for the

selected setpoint appears in the top row. Using the

and buttons, set the

relay activation to operate ABOVE or BELOW the setpoint value, and press .

ABOVE: Relay turns on above the setpoint value and o below it. BELOW: Relay turns on be- low the setpoint value and o above it.

E _ _ _ SP TYPE scrolls across the bottom row, and the current type for the se-

lected setpoint appears in the top row. Using the and buttons, select either ALARM or CNTRL (control), and then press .

ALARM - SP VALUE controls setpoint activation point. HYSTERESIS VALUE controls set- point deactivation point.

CNTRL - SP VALUE controls setpoint deactivation point. HYSTERESIS VALUE controls set- point reactivation point.

Hysteresis band

Energised Below

Hysteresis band

Energised Below

F _ _ _ HYSTERESIS VALUE scrolls across the bottom row, and the hysteresis value

for the selected setpoint appears in the top row. Use the and buttons to

adjust this value if required, and then press .

The HYSTERESIS VALUE denes the separation band between setpoint activation and deacti- vation, and will operate as per the SP TYPE setting selected in 6.2E.

G _ _ _ MAKE DELAY scrolls across the bottom row, and the make delay time for

the selected setpoint appears in the top row. This is the time delay between

setpoint activation, and when the relay turns on. Adjust this value in 0.1 second

increments using the and buttons, and then press .

H _ _ _ OPEN ACCESS TO SP VALUE scrolls across the bottom row, and the open

access permission setting for the selected setpoint appears in the top row. Use

and to select either OFF or ON, and then press .

the

When enabled, this option allows the selected setpoint's value to be edited directly aer pressing the button, without needing to enter a PIN number or go through all of the other options. Each setpoint can individually have this option enabled or disabled. See Section 7.

I _ _ _ EDIT SETPOINT scrolls across the bottom row, and SKIP appears in the top

row. You are now back at 6.2A. Press now to skip to 6.3, or repeat 6.2A–I to

set up another setpoint.

6.3 - Edit SP PIN number

A _ _ _ EDIT SP PIN NUMBER scrolls across the bottom row, and SKIP appears in

the top row. Press to skip and return to the operational display, or the button and then to ENTER and change your PIN number.

B _ _ _ ENTER NEW SP PIN scrolls across the bottom row, and the current PIN

(default 1) appears in the top row. Using the

new SP PIN number. Then press to save and exit to the operational display.

and buttons, enter your

If none of the setpoints have their open access option enabled then this feature will

be disabled and the button will not respond to a short button press. (See 6.2H.)

A Begin by pressing the

B The name of the rst access-enabled setpoint will appear on the display and

toggle with the current value for that setpoint. Using the

adjust the selected value. Then press to accept and continue.

C The name of the next access-enabled setpoint will appear on the display, along

with its setpoint value. Repeat step 7B. The direct access menu will proceed

through all access-enabled setpoints in this fashion. Pressing

bled setpoint will exit and return to the operational display.

SETPOINT OPEN ACCESS

button for less than 3 seconds.

and buttons,

for the last ena-

If you have forgotten your PIN number(s), follow the procedure below to reset both the Cal and SP PINs to their factory default of 1.

This procedure will also allow you to view the current soware installed on your controller, which may be required for support purposes.

A Press

execute and you may need several tries to get it right.)

B A message will appear on the display, with details of the unit's current soware

conguration (Product Name, Firmware Version, and Macro Version). At the end, you will see – ALL PIN NUMBERS RESET TO 1.

C Both the Cal PIN number and the SP PIN number have now been reset to '1'.

You can change this, if required, by following the instructions in 5.7 (for the

Input Setup & Calibration menu) and 6.3 (for the Setpoint Setup menu), using '1' to enter each menu initially.

RESET PIN NUMBERS / VIEW FIRMWARE VERSION

, and at the same time. (This key combination can be dicult to

APPENDIX A - SERIAL MODES

A.1 - Custom ASCII mode

Custom ASCII is a simple, custom protocol that allows connection to various PC con-

guration tools. ('Custom ASCII' diers from the 'Modbus (ASCII)' protocol used by

some devices.) Custom ASCII command strings must be constructed in this order:

Start - Use 'S' for the start character of a command string (not case sensitive). This

must be the rst character in the string.

Controller Address - Use an ASCII number from '1' to '255' for the controller address.

If the character following the start character is not an ASCII number, then address '0' is assumed. All controllers respond to address '0'.

Read/Write Command - Use ASCII 'R' for read, 'U' for unformatted read, or 'W' for

write (not case sensitive). Any other character aborts the operation.

In Custom ASCII mode, data is normally read as formatted data (which includes decimals and any text characters that may be selected to show units). However it is also possible to read unformatted data by using a 'U' in the read command. There is no unformatted write command, as when writing to xed point registers, any decimal point and text characters are ignored.

number from '1' to '65535'. This character must be specied for a write com-

mand, but may be omitted for a read command, (in which case the controller

will respond with the data value currently on the display).

Separator Character - The separator character can be either a space or a comma,

and is used to separate the register address from the data value.

Data Value - Must be an ASCII number. The absolute limits for this number are

–

1000000 to +1000000, but note that not all registers will accept this range.

Message Terminator - This is the last character, and must be either a '$' (dollar) or an

'*' (asterisk). Neither of these characters should be used elsewhere in the message string. If '$' is used, a 50ms minimum delay is inserted before a reply is sent. If '*' is used, a 2ms minimum delay is inserted before a reply is sent.

Custom ASCII Read/Write Examples

Example Description

S15R$ Read display value from controller address 15, 50ms delay.

S3U40* Read unformatted data in channel 4 from controller address 3, 2ms delay.

–

S2W2 –10000$ Write

SWT CHAN_1$ Write ASCII text string Chan_1 to channel 1 text register, 50ms delay.

10000 to the display register of controller address 2, 50ms delay.

Custom ASCII Registers - Active for models with relay output installed

16 Bit Unsigned

Address Function

1 Alarm status (SP1=Bit 0, SP2=Bit

1, SP3=Bit 2, SP4=Bit 3)

65–68 Hysteresis (SP1=65, SP2=66, SP3

=67, SP4=68)

71–74 Make delay (SP1=71, SP2=72, SP

3=73, SP4=74)

32 Bit Signed

Address Function

16 Room temperature

250 Wet bulb temperature

254 Humidity display

6–9 Setpoint 1–4 (SP1=6, SP2=7, SP3

=8, SP4=9)

12 Peak

13 Valley

34 D/A 1 scale low value (humidity)

35 D/A 2 scale low value

(room temp)

36 D/A 1 scale high value (humidity)

37 D/A 2 scale high value

(room temp)

Controller Response - Aer the controller has completed a read or write instruction,

it responds by sending a carriage return/line feed (CR/LF) back to the host.

If the instruction was a read command, the CR/LF follows the last character in

the ASCII string.

If it was a write command, CR/LF is the only response sent back. The host must

wait for this before sending further commands to the controller.

If the controller encounters an error, it will respond with a null (0x00) CR/LF.

A.2 - Modbus (RTU) mode

Modbus (RTU) is an industry standard RTU slave mode that allows connection to a

wide range of devices. Modbus registers are all holding registers, and should be ac-

cessed via function codes 3 and 6.

Modbus (RTU) Registers - Active for models with relay output installed

16 Bit Unsigned

Address Function

40001 Alarm status (SP1=Bit 0, SP2=Bit

1, SP3=Bit 2, SP4=Bit 3)

40065– 40068

40071– 40074

Hysteresis (SP1=40065, SP2= 40066, SP3=40067, SP4=40068)

Make delay (SP1=40071, SP2= 40072, SP3=40073, SP4=40074)

32 Bit Signed (2 x 16 Bit)

LSW MSW Function

40529 40530 Room temperature

40523 40524 Wet bulb temperature

40515 40516 Humidity display

40525 40526 Peak

40527 40528 Valley

40535 –541

40587 40588 D/A 1 scale low value

40589 40590 D/A 2 scale low value

40591 40592 D/A 1 scale high value

40593 40594 D/A 2 scale high value

40536 –542

Setpoint 1–4 (SP1=40535, SP2=40537, SP3=40539, SP4=40541)

(humidity)

(room temp)

(humidity)

(room temp)

A.3 - Ranger A mode

Ranger A is a continuous output, used to drive remote displays and other instru-

ments in the Rinstrum™ range. (Ranger is a trade name belonging to Rinstrum Pty

Ltd.) Ranger A output strings are constructed as shown:

Start - STX character (ASCII 02)

Sign - Output value sign (space for + and dash for -)

Output Value - Seven character ASCII string containing the current output value and

decimal point. (If there is no decimal point, then the rst character is a space.

Leading zero blanking applies.)

Status - Single character output value status. 'U'=Under, 'O'=Over, 'E'=Error.

End - ETX character (ASCII 03)

De ne Instruments

New Zealand

(Head O ce)

Auckland 0632, New Zealand

Auckland 0661, New Zealand

Ph Fax

www.de neinstruments.co.nz

10B Vega Place, Rosedale,

PO Box 245 Westpark Village,

: +64 (9) 835 1550

: +64 (9) 835 1250

sales@de neinstruments.co.nz

TEX-DEW200 MV1.9 Revision Code: TEX-DEW200-MAN-15V06 Date Code: 151002

United States (Dallas, TX)

Ph: (214) 926 4950

sales@de neinstruments.com

www.de neinstruments.com

Define Instruments TEX-DEW200 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual