Emerson MRLDS User Manual

026-1307 Rev 1 11-30-07
Modular Refrigerant Leak Detection
Sensor (MRLDS) Inst allation and
Operation Manual
Computer Process Controls, Inc.
1640 Airport Road Suite #104
Phone 770-425-2724
Fax 770-425-9319
ALL RIGHTS RESERVED The information contained in this manual has been carefully checked and is believed
to be accurate. However, Computer Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein. In no event will Computer Process Controls, Inc. be liable for any direct, indirect, special, incidental, or consequential damages resulting from any defect or omission in this manual, even if advised of the possibility of such damages. In the interest of continued product development, Com­puter Process Controls, Inc. reserves the right to make improvements to this manual, and the products described herein, at any time without notice or obligation.
Computer Process Controls, Inc. products may be covered by one or more of the fol­lowing Computer Process Controls U.S. patents: 6360553, 6449968, 6378315, 6502409, 6779918, and Computer Process Controls Australian patent No. 775,199 No­vember 4, 2004.
FCC COMPLIANCE NOTICE
This device complies with Part 15 of the FCC Rules. Operation is subject to the fol­lowing two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Table Of Contents

1 OVERVIEW................................................................................................................................................................... 1
1.1 S
PECIFICATIONS............................................................................................................................................................. 1
1.2 MRLDS M
1.3 P
OWERING THE MRLDS................................................... ............................................................................................ 1
2 CHOOSING A MOUNTING LOCATION................................................................................................................. 2
2.1 M
OUNTING THE SENSOR............................................................................................................................................... 2
2.2 MRLDS D
3 MRLDS ANALOG VERSION (809-100X).................................................................................................................. 3
3.1 N
ETWORK LAYOUT ....................................................................................................................................................... 3
3.2 MRLDS W
3.3 R
EFRIGERANT JUMPER SETTINGS .................................................................................................................................. 4
3.4 C
ONTROLLER SETUP FOR ANALOG MRLDS ................................................................................................................ 4
4 MRLDS MODBUS VERSION (809-101X).................................................................................................................. 5
4.1 N
ETWORK LAYOUT ....................................................................................................................................................... 5
4.2 MRLDS S
4.3 MRLDS G
4.4 C
ONTROLLER SETUP FOR MODBUS MRLDS .......................... ...................................................................... .............. 11
ODELS.......................................................................................................................................................... 1
IMENSIONS.................................................................................................................................................... 3
IRING ........................................................................................................................................................... 3
ETUP.............................................................................................................................................................. 5
ATEWAY ....................................................................................................................................................... 7
5 DIAGNOSTICS............................................................................................................................................................ 14
5.1 MRLDS LED I
5.2 E2 A
LARMING ............................................................................................................................................................. 14
NDICATORS ......................................................................................................................................... 14
MRLDS I&O Manual Table of Contents • v

1 Overview

CPC specs a modular refrigerant leak detection sensor (MRLDS) that continuously monitors for low levels of refrigerants most commonly used in commercial refrigera­tion systems.
The MRLDS communicates with the E2 controller via a Gateway board connected to the RS485 I/O Network, or via the analog input on a MultiFlex board.

1.1 Specifications

Figure 1-1 - Sensor Base Opening With Screw Terminals
Power Require­ments
Wiring
Power Consump­tion
Output Options
Operating Temp.
Humidity Size Weight Pollution Degree Installation Cate-
gory Range Minimum Detec-
tion Pressure Repeatability Linearity
Warm-up Time
Table 1-1 - MRLDS Unit Specifications
*De-icer: for environments below 32°F to keep ice from forming on the surface of enclosure.
24 VAC, ±20%, 50/60 Hz, Class 2
14 AWG max, Class 2 copper wir­ing
Less than 2.7 watts
1-5V, 10 K Ohm load RS485 Modbus RTU
32 to 149°F (-22 to 149°F with de-icer*)
0 to 65°C (-30 to 65°C with de-icer*)
0 to 99% non-condensing
4.5” x 3.5” x 1.6” .35 lbs. (160 g) 2 II
0 to 1000 ppm 25 ppm
Operating 10.2 to 15.7 PSIA ±10 ppm at 50 ppm ±10 ppm from 25-50 ppm,
±20% of reading from 60 to 1000 ppm
30 minutes

1.2 MRLDS Models

Part Number Description
809-1000 Voltage Out w/o de-icer* 809-1001 Voltage Out w/ de-icer* 809-1010 Modbus w/o de-icer* 809-1011 Modbus w/ de-icer*
Table 1-2
- Available MRLDS Models

1.3 Powering The MRLDS

Part Number Transformer
Description
640-0039 24VAC, 10V A
Class 2
Table 1-3
Certified 24VAC Class 2 transformer power supply. One 24VAC, 10VA Class 2 transformer is sufficient for up to three (3) MRLDS units.
ing multiple MRLDS units (three or more). Note that polarity must be maintained when connecting more than one MRLDS to a single transformer.
voltage by double insulation, or an appropriately rated UL Listed/CSA Class 2 transformer. Failure to follow the above can result in serious personal injury or death.
- MRLDS Transformer Specifications
The MRLDS unit requires a separate UL Listed/CSA
CPC supplies several sizes of transformers for power-
WARNING: The MRLDS unit must be always be powered by either a suitable UL 60950/CSA Certified power supply that is isolated from line
Number of
MRLDS Units
Powered
Up to 3
Specifications Overview1
If a transformer is shared between MRLDS units, the “ACN” of each MRLDS must be wired to the same phase of the transformer.
120VAC
MRLDS I
24VAC
r
e
m
r
o
f
s
n
a
r
T
ACN
MRLDS II
Figure 1-2
- Powering Multiple MRLDS Units

2 Choosing a Mounting Location

Proper location of the refrigerant sensor is necessary to ensure accurate measurement of representative air sam­ples.
Mount the sensor:
Indoors, inside a room area where air circulates freely.
On a flat, interior surface.
Approximately 12-18 inches (30-45 cm) from the floor.
Do not
mount the sensor:
On surfaces in unheated areas (less than unless using a model with a de-icer.
Near heat sources, such as appliances, direct sunlight, or concealed pipes or chimneys.
On walls subject to excessive vibration.
In the direct path of an exhaust fan. Excessive air movement will disperse gas before it can be detected. If mounting in the path of excessive airflow cannot be avoided, it will be necessary to turn OFF air circulation for 1/4 to 1/2 hour,
4-6 times a day.
NOTE: For example, if mounted inside a motor room, exhaust fans must be shut off during the intervals that air samples will be tested for
refrigerant levels.
0°C),
Figure 2-1 - Sensor Base And Cover

2.1 Mounting The Sensor

The refrigeration monitor comprises two basic parts: the base and the cover. The cover incorporates the circuit board with the sensing elements.
1. Fasten the base to a junction box or other support. The base has a number of openings to allow for mounting to various junction boxes.
2. Feed the power and signal wires through the rect­angular opening in the base (Figure 1-1).
3. Connect the wires to the terminal connector located in the base, as indicated in Figure 4-2 and Figure 3-2.
4. The Modbus MRLDS must be connected to earth ground. Connect earth ground to the MRLDS
ground terminal labeled . Connect to earth ground with 14 AWG wire that is less than 6 inches.
5. Align the two side tabs of the cover with the base and snap the cover onto the base.
6. Verify the cover is securely attached to the base by pulling on the top and bottom of the cover as shown in Figure 2-2.
NOTE: To remove the cover, grasp it along the recesses and pull it away from the base (Figure 2-2). Alternatively, place a screwdriver into the
slots indicated in Figure 2-2 and twist.
2MRLDS I&O Manual 026-1307 Rev 1 11-30-07
Figure 2-2
s
s
A
transforme
- Attaching and Removing Cover

3 MRLDS Analog Version (809-100x)

3.1 Network Layout

E2
e
c
r
i
e
v
h
e
t
D
O
t
o
e
T
I/O Net
N
O
/
I

2.2 MRLDS Dimensions

Figure 2-3 - MRLDS Mounting Dimensions
MultiFlex Board
MRLDS Unit
Figure 3-1 - Analog MRLDS Network Layout Example

3.2 MRLDS Wiring

For analog MRLDS units, connect to a MultiFlex
board via the analog input (use Belden 8761 cable).
Analog MRLDS to MultiFlex
ANALOG MRLDS ­INSIDE LOWER PORTION OF BASE
Wire MultiFlex SIG to MRLDS OUT(V). Wire MultiFlex 0V to MRLDS Ground ( ).
)
) +
V
(
(
S
T
A
U
G
O
G
I S
BELDEN 8761
C A
N
V
C
4
A
2
d n
0V
TO 24VAC, 10VA
u o
CLASS 2 POWER
r
SUPPLY
G
EARTH SHIELD NEAR THE MULTIFLEX BOARD. CONNECT
DO NOT THE SHIELD TO THE 0V INPUT ON THE MULTIFLEX BOARD.
MULTIFLEX BOARD ­LOWER RIGHT CORNER
34
12
0V
0V
SIG
SIG
INPUT 13
INPUT 14
)
d
V
(
n
T
u o
U
r
O
G
transformer must never between MRLDS and the MultiFlex
BELDEN
board. A
8761
transformer be used.
If a transformer is shared between MRLDS units, the “ACN” of each MRLDS must be wired to the same phase of the
567
0V 0V
SIG SIG
INPUT 15
INPUT 16
be shared
separate
must
r.
8
Figure 3-2 - Analog MRLDS Wiring
MRLDS Dimensions MRLDS Analog Version (809-100x)3
3.3 Refrigerant Jumper
A
Settings
The jumper settings for refrigerant types are located on
the label inside the MRLDS sensor cover (shown in Fig- ure 1-1). Set the jumpers according to how they are indi­cated on the label.
The MRLDS supports three different refrigerant types.
Select the desired refrigerant type by setting one jumper to the J2 or J1 sockets (Figure 2-1) respective per the inside label.
nalog Jumpers
J2
J1
5. Select the board/point input.
6. Press F1 Setup.
7. Select Analog Sensor.
8. On the Analog Input screen, select MRLDS Refr. as the Sensor Type. The parameters are then automatically configured for you.
9. Press the
If the device is configured and powered correctly, a
value will be visible under the Value column on the Input Status screen.
J (Back) button to save changes.

3.4.2 Einstein/E2 Controllers Prior to Version 2.5

For Einstein and E2 controllers prior to version 2.5, follow the steps below, set the sensor type to Linear, and manually enter the parameters:
J2J1
refrigerant type jumpers
Figure 3-3
Cover) Enlarged To Show Detail
Table 3-1
- Analog Jumper Layout (Inside Lower Portion of
Refrigerant Type J2|J1
R-22
R-404A
R-134A
- Refrigerant Jumper Settings

3.4 Controller Setup For Analog MRLDS

3.4.1 E2 Controllers Version 2.5 and Newer

1. Log into the E2 controller.
2. Press the Menu button to open the Main Menu.
3. Select 7. System Configuration.
4. Select 1. Input Definitions.
5. Select the board/point input.
6. Press F1 Setup.
7. Manually enter the following parameters on the Input Setup screen:
•Sensor Type: Linear
•Low End Point: 0.8V
•Low Eng. Units: -50
•Select Eng. Units: PPM
•HighEnd Point: 5.5V
•High Eng. Units: 1125
•Low End Limit: -100
•HighEnd Limit: 1150
(Set the alarm failure to < -10PPM.)
8. Press the
If the device is configured and powered correctly, a
value will be visible under the Value column on the Input Status screen.
J (Back) button to save changes.
1. Log in to the E2 controller.
2. Press the Menu button to open the Main Menu.
3. Select 7. System Configuration.
4. Select 1. Input Definitions.
4MRLDS I&O Manual 026-1307 Rev 1 11-30-07
k
y)
transforme

4.2 MRLDS Setup

4.2.1 MRLDS Wiring

MODBUS MRLDS - INSIDE LOWER
PORTION OF BASE
To Gateway Board
Figure 3-4
- Analog Input Screen Settings Example for E2

3.4.3 RMCC Controllers

For RMCC-type controllers, set the Gain parameter to
250 and Offset to -1000.

4MRLDS Modbus Version (809-101x)

4.1 Network Layout

)
)
-
+
(
( 5
5
8
8
4
4
S
S
R
R
MODBUS NETWORK
BELDEN 8761
Shield drain/ground wire
D N G
H T
N
R
C
A
A
E
C A V 4 2
14 AWG less than 6 inches
A transformer must
be shared
never between MRLDS and the Gateway board. A transformer be used.
If a transformer is shared between MRLDS units, the “ACN” of each MRLDS must be wired to the same phase of the
separate
must
r.
Figure 4-2 - Modbus MRLDS Wiring

4.2.2 MRLDS Network Addressing

Modbus network settings are set on jumpers J5, J4,
and J3. Refer to Table 4-1 (also included on the inside label of the MRLDS) for network addressing with corre­sponding jumper settings.
If more than one MRLDS is on the network, each unit
must have a unique address and be numbered according to the inside label (Table 4-1) specifications.
E2
+
-
I/O Net
J1
J6
term jumper
J5J4J3
network address jumpers
J2J1
refrigerant type jumpers
MODBUS
-
+
Gateway
+
+
+ +
(Up to 12 MRLDS units on the networ per Gatewa
J6
MRLDS
-
MRLDS
-
MRLDS
-
MRLDS
-
Figure 4-3 - MRLDS Jumpers (Inside Lower Portion of Cover)
Figure 4-1 - Network Layout Example
Network Layout MRLDS Modbus Version (809-101x)5

4.2.3 Address Settings

the J2 or J1 sockets respective per the inside label.
Modbus Address
Jumper Settings
100
101
102
103
104
105
106
107
108
J5|J4|J3
No jumpers installed
J6
Figure 4-4 - Modbus Jumper Layout (Inside Lower Portion of
Cover) Enlarged To Show Det a i l
Refrigerant Type J2|J1
Table 4-2
J1
J5J4J3
J6
term jumper
R-22
R-404A
R-134A
- Refrigerant Jumper Settings
network address jumpers
J2J1
refrigerant type jumpers
109
110
111
Table 4-1
- MRLDS Modbus Address Jumper Settings

4.2.4 Refrigerant Jumper Settings

The jumper settings for refrigerant types are located on
the label inside the MRLDS sensor cover (shown in Fig- ure 1-1). Set the jumpers according to how they are indi­cated on the label.
The MRLDS supports three different refrigerant types.
Select the desired refrigerant type by setting one jumper to

4.2.5 MRLDS Termination

The MRLDS has a built-in, on-board means of termi­nation, so an external termination block is not necessary for terminating. When the device is located at the end of a daisy chain, jumper JP6 for terminat io n.
J6
Figure 4-5 - MRLDS Termination (Inside Lower Left of Cover)
J1
Termination jumper
J5J4J3
J6
J2J1

4.2.6 Modbus Output

See Table 4-3 below for Modbus registers in the MRLDS Unit. Baud rate: 19,200; each byte is 8 (eight)
6MRLDS I&O Manual 026-1307 Rev 1 11-30-07
bits with no parity and 2 (two) stop bits.
Register
Name
Fault and
Module
State
Gas
Number
Gas Con-
centration
Gas
Numbers
PDU
Address
0x0000 1 Under Range
0x0001 2 0 to 40
0x0002 3 -20 to 1050
R-22 = 6 R-404A = 27 R-134a = 15
Logical
Address
Range
2 (msb)
Under Volt­age 8 (msb)
Temperature 10 (msb)
Lamp Fail 40 (msb)
Test Mode 80 (msb)
Warm Up Complete 0 (Lsb)
Cal/Setup 2 (Lsb)
Factory Mode 4 (Lsb)
Trouble Mode 8 (Lsb)
(ppm)
SELECT I/O NET MODE OFF = IRLDS ON = 16AI
ON
ON = 16AIOFF = IRLDS
Figure 4-6 - I/O Network Modes

4.3.2 Gateway Connections

Up to 12 MRLDS units may be connected to the Gate­way board (P/N 810-3040). The Gateway board can inter­face with a site controller as a 16AI or as an IRLDS. If the site controller is an Einstein or E2, it is recommended to interface them as an IRLDS. Multiple Gateways can be used, each with up to 12 connected MRLDS units.

4.3.3 The Gateway Board

Table 4-3
- RS485 Output Specifications

4.3 MRLDS Gateway

4.3.1 MRLDS Gateway Setup on I/O Network

Modbus versions of the MRLDS must be connected to the 810-3040 MRLDS Gateway. The MRLDS Gateway can be mapped in either of two ways: it can be set up on I/O Net as an IRLDS application or as a 16AI board. Select by setting the Gateway’s dip switch #5 to the OFF or ON position (Figure 4-6).
MRLDS Gateway MRLDS Modbus Version (809-101x)7
Figure 4-7 - MRLDS Gateway Board Layout (810-3040)
CAUTION: Before installing the Gateway
board, verify the jumper JP7 (located near the
top center of the board) is set to the “NOR­MAL” position (not the “TEST” position). Operating the Gateway with the jumper in “TEST” position may cause board damage.
The Gateway Board communicates with the MRLDS via the Modbus network, which is connected to the Gate­way’s “Receiver Bus” network terminal. The Gateway communicates with the E2 via the RS485 I/O Network.

4.3.4 Powering the Gateway Board

Input Voltage 24VAC, Class 2, Center-Tapped
50/60Hz
Power 5VA
Table 4-4
Class 2 center-tapped transformer. CPC supplies several sizes of center-tapped transformers for powering multiple 16AIs, 8ROs, and other RS485 peripheral boards.
transformers to the Gateway power connector.
Power Rating
Table 4-5 - Power Ratings for CPC Transformers
- Gateway Power Requirements
The Gateway board requires 24VAC power from a
Figure 4-8 shows how to connect the 56VA and 80VA
Three-Board Six-Board
P/N
640-0056 640-0080 56 VA 80 VA
Figure 4-8 - Pinout for the 56VA (640-0056) and 80VA (640-
0080) Transformers
CAUTION: The MRLDS unit requires a sepa­rate Class 2, 24VAC, 10VA power supply.

4.3.5 Connecting the Gateway Board to the Einstein or REFLECS Network

Each E2, Einstein, or REFLECS site controller that will communicate with one or more MRLDS units must have a Gateway Board installed on its RS485 I/O Net­work. For Einstein controllers, this means the Gateway will be installed on the RS485 I/O Network; for RMCC, BEC, BCU, and other REFLECS products, the Gateway will be installed on the COM A or COM D network.

4.3.6 Wire Connections

Using shielded three-conductor network cable (Belden #8641 or equivalent), connect the RS485 I/O Network wire to the three-terminal connector on the Gateway boar d as shown in Figure 4-9. For further information about how RS485 networks are configured, refer to your site
8MRLDS I&O Manual 026-1307 Rev 1 11-30-07
controller’s user manual.
e
/
)
GATEWAY BOARD
RS485 I/O NET
TERM JUMPERS
-485 0v
+485
TERMINATION
(ALWAYS TERMINATE)
RS485 I/O NET (TO CPC CONTROLLER
Figure 4-9
- Connecting the Gateway to the E2 RS485 Network
To connect the Gateway to an MRLDS, feed the wires
through the rectangular opening in the sensor base as indi­cated in Figure 1-1. Locate the RS485 connector and secure the wire leads to the connector orienting them as shown in Figure 4-10. Connect multiple MRLDS units in a daisy-chain configuration as shown in Figure 4-1.
MRLDS - INSIDE LOWER PORTION OF BASE
D
B
A
­5 8 4
S R
MODBUS NETWORK
+ 5 8 4
S R
N G
H T
N
R
C
A
A
E
Shield drain/ground wir
C A V 4 2
GATEWAY BOARD
-485 0v +485
-485 0v
+485
To MRL DS MODBUS
Shield drain ground wire
Figure 4-10 - Connecting the Gateway to MODBUS

4.3.7 Termination Settings

As part of a site controller’s RS485 I/O (COM A or COM D) Network, a Gateway must be terminated if it is the end device of a daisy chain. The Gateway on the Mod­bus Network should always be terminated and always located at the end of the daisy chain.
Refer to the site controller’s user manual for informa­tion about daisy chain networks and how they are termi­nated.
T o terminate the Gateway (the Modbus jumpers should always
be terminated on the Gateway), set the receiver bus
jumpers to the RIGHT position (Figure 4-11).
Figure 4-11 -MRLDS Gateway Termination

4.3.8 Gateway Board I/O Net Addressing

Set the address on the I/O Network with switches 1-4. There can be more than one MRLDS Gateway with each supporting up to 12 MRLDS units.
Switch 5 indicates whether the MRLDS will be mapped as an IRLDS or 16AI. Set switch 5 to the OFF position for IRLDS emulation or to the ON position for 16AI emulation.
I/O NET MODE ON = 16AI OFF = IRLDS
ADDRESS ON I/O NET
14
15
Figure 4-12 - Network Layout Example
MRLDS Gateway MRLDS Modbus Version (809-101x)9

4.3.9 Setting the Baud Rate Dip Switches

Dip switches 6 and 7 control the baud rate at which the Gateway communicates with the site controller on the RS485 Network. These switches must be set to the same baud rate setting as the controller you are using (Einstein, RMCC, or E2), and defaults to 9600 baud. Dip switch 8 controls the baud rate at which the Gateway communicates with the MRLDS. For 9600 baud, set dip switch 8 to the OFF position. For 19200 baud, set dip switch 8 to the ON position (always use 19200 baud for MRLDS).
GATEWAY
DIP SWITCH
I/O NETWORK OR COM A AND D BAUD RATE
(GW to E2)
2345678
1
ON
I/O NET BAUD RATE SETTINGS
9600 19200
OFF = 9600 BAUD ON MODBUS ON = 19200 BAUD ON MODBUS
(GW to MRLDS)
ALWAYS USE 19200 BAUD WITH MRLDS
I/O ADDR: 1 I/O BAUD: 9600 MOD BAUD: 19200
Figure 4-15 - Baud Rate/Address Screen
The Baud Rate/Address screen displays the Gateway I/O Network address (I/O ADDR), the I/O Network baud rate between the Gateway and the E2 (I/O BAUD), and the Modbus baud rate between the Gateway and the MRLDS devices (MOD BAUD).
4.3.10.2 Select Screen
Press the down arrow again to navigate to the Select screen (or press F2). From the Select screen you can see
status, setup, and firmware version information.
To select, press the right arrow until it appears next to SELECT and press 1, 2, or 3 in the list. Press the down arrow twice to move to the desired screen.
SELECT: 1 1 - STATUS 2 - SETUP/ONLINE 3 - FW REVISION
Figure 4-13
- Dip Switch Settings for Gateway Baud Rate
4.3.10 Hand-Held Terminal Set­tings
The hand-held terminal can be used to view status information, enable unit addresses, and is connected directly to the Gateway board via the hand-held terminal jack.
MRLDS GATEWAY 810-3040 VER:1.10B03 ( PRESS )
Figure 4-14 - MRLDS HHT Home Screen
4.3.10.1 MRLDS Setup
From the HHT Home screen (F1), press the down arrow key to navigate to the Baud Rate/Address screen (Figure 4-15).
Figure 4-16 - Select Screen
4.3.10.3 Status Screen
1 - The Status screen displays general status informa-
tion about the MRLDS such as device numbering, count information (gas concentration in ppm), the type of refrig­erant gas being monitored (MRLDS jumpers set by the user), and whether an alarm has been issued. An alarm indicates an MRLDS failure and that the MRLDS should be replaced. Call the CPC Service Department (770-425-
2724) to verify if the MRLDS unit should be replaced. Possible states (ST) are:
• WARMUP - MRLDS is warming up.
• NORMAL - MRLDS has completed warm-up and is operating normally.
• OFFLINE - MRLDS has lost communication.
• UNUSED - This address is not being used.
• FAIL - MRLDS has reported a fail state. Check the ALM field for specification.
10MRLDS I&O Manual 026-1307 Rev 1 11-30-07

4.3.11 Gateway Troubleshooting

100: CNT: 1 GAS: R134A ST: NORMAL ALM: NONE
Figure 4-17
replaced.
- Status Screen
NOTE: If the HHT displays any type of alarm, contact the CPC Service Department (770-425-
2724) to verify if the MRLDS unit should be
4.3.10.4 Setup/Online Screen
2 - The Setup/Online screen displays the addressing of
the devices and whether they are enabled. Press the right/ left arrows to select the first address in the list. Toggle the minus button to enable the first address in the list (Figure 4-18). If communication is established, the screen will show “ON-L” indicating the unit is set up and online.
100: ENBLE ON-L 102: ::
103 104:
Figure 4-18
- Setup/Online Screen
If there is an issue with the Gateway board, the HHT Home screen (F1) can give status indicators to report the issue. The Home screen will display a warning if there is a failure associated with the I/O Network or flash on the Gateway board. Select the HHT Status scr een to view sta­tus information for each MRLDS unit.

4.4 Controller Setup for Modbus MRLDS

4.4.1 Mapping The MRLDS as an IRLDS Application

To set up communication on the I/O Network as an IRLDS application:
1. Log in to the E2 controller.
2. Press the Menu button to open the Main Menu.
3. Select 7. System Configuration.
4. Select 7. Network Setup.
5. Select 2. Connected I/O Boards & Controllers
and add the desired number of MRLDS Gate­ways as IRLDS under I/O Net Devices. Up to 12 units can be connected to each Gateway.
6. Press the
1. Online Status (Alt + N) to check the status.
7. Go into the IRLDS application under General Setup and add the number of MRLDS units (Num Channels field) connected to the Gateway .
J (Back) button and select
NOTE: For IRLDS mode, disable unused addresses by toggling the minus key to DISABLE. Unused addresses that have not been
disabled may cause a false failure on the E2.
4.3.10.5 Firmware Revision Screen
3 - The Firmware Revision scr een displays the address
of the MRLDS unit with its associated firmware revision.
100: ENABLE 1.12 102: -----­103: -----­104: ------
Figure 4-19
Controller Setup for Modbus MRLDS MRLDS Modbus Version (809-101x)11
- Firmware Revision Screen

4.4.2 Designating MRLDS as a 16AI Board

1. Log in to the E2 controller.
2. Press the Menu button to open the Main Menu.
3. Select 7. System Configuration.
4. Select 7. Network Setup.
5. Select 2. Connected I/O Boards & Controllers and add the desired number of 16AI boards unde r I/O Net Devices.
6. Press the
1. Online Status (Alt + N) to check the status.
For mapping the MRLDS unit as a 16AI board, first set
dip switch #5 on the Gateway board to the ON position.
Follow Steps 1-6 above, but for Step 6 select the num-
ber of 16AI boards to equal the number of MRLDS Gate-
J (Back) button and select
ways.
Navigate to the controller’s Input Status screen and highlight the board and point that you wish to map. Press F1 to go to the Input Setup screen for that board/point. Each point will increase incrementally to correspond with each board. (For example, where the MRLDS is address 1
and the MRLDS address is 100, use board 1, point 1. For an MRLDS address of 101, use point 2.)

4.4.3 E2/Einstein Controllers

Next, set up the following parameters on the Input Setup screen:
•Sensor Type: Linear
• Low End Point: 0.00000
• Select Eng. Units: PPM
• HighEnd Point: 4.80000
• High Eng. Units: 1200.0000
4.4.4 RMCC Controllers Version
2.1 and Newer
4.4.4.1 REFLECS Setup for IRLDS IIs
Set dip switch 8 to ON and follow the steps for setting
up IRLDS IIs through the REFLECS controller interface:
1. Log on.
2. Press 7 for Configuration to reach the CON- FIGURATION screen.
Input Definitions should be set here to show how the sensor control is linked to the zone. The number of devices and IRLDS IIs are connected to the Gateway and enabled is the number of address slots the Gateway will use.
3. Press 1 for Input Definitions to reach the INPUT DEFINITIONS screen.
4. Pressing the down arrow several times will get you to the input list of SENS01-48. Bd (board) is the address of the Gateway, Pt (point) is the zone and allows you to define where the sensor input comes from.
The board number for the IRLDS II setup is the address of the Gateway. If there are three or less IRLDS II control­lers connected to a Gateway, the Gateway address = the IRLDS II address. However, if there are more than three IRLDS controllers, the second Gateway address will be the one entered for the board number, but the IRLDS II con­trollers are set 1 to 3 on the second Gateway.
5. Press 0 (zero) to go back to the CONFIGU- RATION screen.
6. Press 7 for I/O Brd Setup to reach the I/O BOARD MENU screen.
7. Press 2 to Set Device #’s.
The Gateway will react as three 16AI boards. The num-
ber of IRLDS II controllers plus the real number of 16AIs
Figure 4-20
12MRLDS I&O Manual 026-1307 Rev 1 11-30-07
- Analog Input Screen Settings Example for E2
= the total number of 16AIs to enter in the next step:
8. At the I/O BOARD DEVICE NUMBERS screen, press the down arrow key to reach Number 16AI Boards and enter the number of how many 16AI boards and IRLDS II con­trollers there are. Press Enter.
9. Arrow down to the I/O BOARD MENU and press 0 (zero) twice to go back to the MAIN MENU screen.
10. Press 4 for Sensor Control.
11. Press 2 for Setup--up to 48 sensor control programs are allowed. Select one of the 48 units and press Enter to reach the SENSOR SETUP screen.
12. Press the right arrow to move to the Name
field to change the name, and press the down or right arrow to move to the (sensor) Type field. Use the “.” and “” keys to scroll through the options and select IRLDS. (The Gain and Offset parameters are automatically configured for you.)
13. Use the arrow keys to move off the active fields and press 0 (zero) twice to go back to the main screen.

4.4.5 BEC and RMCC Controllers Less Than Version 2.1

4.4.5.1 Input Definitions
Locate the screens in the BEC or RMCC that are used to define input board and points. This is usually achieved by pressing 7 then 1 from the Main Menu. Press the DOWN ARROW key several times until the SENS01­SENS08 inputs are shown.
The 16AI connected to the IRLDS’s output terminals must be set up in the REFLECS’s system software. If the 16AI was given a unique board number by setting the dip switch S3, and wired to the terminals so that each zone number corresponds to a 16AI point number (zone 01 con­nected to point 01, for example), these board and point ad­dresses must now be entered into the REFLECS.
The screen above shows how the board and point ad­dresses for zone 1 would be set up for a 16AI board num­bered 1. Both SENS01 and SENS02 are set up as 01:01 so that SENS01 can monitor concentration and SENS02 can monitor fault status.
Set up the remaining sensors using the instructions giv­en above. For each point on the 16AI, set up two sensors with the same addresses.
4.4.5.2 Sensor Setup
SENSOR SETUP 12:00
#:01 Status:OFF Name:REFR LK ZN 01 Type: Linear
(T)mp (1)00 (5)00 (R)fLeak (K)Watt (H)um (2)00 (D)ig (L)inear L(Q)Lev (6)450 Tmp Dew(P)nt
Logging Interval (HH:MM:SS): 00:03:00
=PREV =NEXT ->=SET-DATA 0=MENU
Locate the screen in the BEC or RMCC where sensors are set up. This is usually a menu option in the Sensors Menu, which may be reached from the Main Menu.
The 0-4.8V signal is a linear signal representing a mea­sured concentration of 0-1200 ppm, and a voltage of 5.0V indicates a fault. In order for the REFLECS to read these voltages correctly, the REFLECS sensor inputs must be configured as linear sensors.
Name
A name for the sensor input may be entered in the Name field. Since each IRLDS zone is set up with two REFLECS sensor inputs, choose names for each input that distinguish the input’s function. For example, the sensor input set up to read leak concentrations on zone 1 should have a name like REFR LK ZN 01, and the input set up to monitor fault sta­tus should have a name like FAULT ZN 01.
Type
All sensor inputs connected to an IRLDS should be set up as linear sensors. Enter (L)inear in the Type field.
Logging Interval
The logging interval is the amount of time between log entries in the REFLECS’s Data Log.
When choosing a logging interval, keep in mind the amount of time it takes an IRLDS to go through an entire cycle of samplings. For example, a 16-valve IRLDS with 30 second sampling times for each zone takes a total of eight minutes to sample all zones. Choosing a logging in­terval smaller than the IRLDS’s cycle time will simply clutter the REFLECS data log with multiple copies of the same sample.
4.4.5.3 Sensor Setpoints
SENSOR SETPOINTS LINEAR INPUT 12:00
#:01 Status:OFF Name:REFR LK ZN 01 Stay ON for:000 min Eng.Unit:PPM Using Diff Of 01 00 00 00
0Of0000
Gain 250 Offset 00000 mv
ON: 0 Dly: 0000 OFF:0 Dly:0000
=PREV =NEXT ->=SET-DATA 0=MENU
Locate the screen in the BEC or RMCC where sensor set points are specified. This is usually a menu option in the Sensors Menu, which may be reached from the Main Menu.
After the linear sensors have been set up, the REFLECS must be told how to interpret the linear voltage given by the IRLDS.
Eng. Unit
The REFLECS does not require any specific engineer­ing unit to be specified for sensor values. However, for eas­ier reading of status screens and data logs, “PPM” should be entered for sensor inputs that read concentration, and
Controller Setup for Modbus MRLDS MRLDS Modbus Version (809-101x)13
“MV” should be entered for sensor inputs that read fault status.
Gain and Offset

5 Diagnostics

Since the output terminals emit one volt for every 250 ppm of refrigerant detected, the gain for the refrigerant leak sensors must be set to 250 and the Offset to 0.
The sensors configured to detect faults must be given a gain of 1000; this way, the REFLECS can be set up to alarm whenever it detects a 5000 mV signal.
4.4.5.4 Alarm Setpoints
Locate the screen in the BEC or RMCC where sensor alarm set points are specified. This is usually a menu option in the Sensors Menu, which may be reached from the Main Menu.
The REFLECS should now be capable of interpreting the 0-4.8V output voltage as a refrigerant concentration of 0-1200 ppm and the 5V output voltage as a fault. The de­sired alarm set points must now be specified. When set up correctly, alarms will appear in the REFLECS Alarm log as “Hi Sensor” alarms (refer to the REFLECS manual for alarm descriptions).
Alarms: High
In this field, specify a high alarm setpoint for refriger­ant leak alarms between 0 and 1200 ppm. For fault status alarms, enter a setpoint of 4960 mV (slightly below 5V, as a precautionary measure).
Alarms/Notices Dly
The value entered in the Alarms Dly field is the number of minutes the sensor reading must be above the Alarms:High set point before the REFLECS may generate a leak alarm
When choosing an alarm delay, keep in mind the amount of time it takes an IRLDS to complete a sampling cycle. For example, a 16-valve IRLDS with 30 second sam­pling times for each zone takes a total of eight minutes to sample all zones. Choosing an alarm delay smaller than the IRLDS’s cycle time will cause an alarm to be generated af­ter only one high reading is taken.
5.1 MRLDS LED Indica­tors
The MRLDS has three LEDs for quick status indica-
tion.
MRLDS
LEDs
Green Lights during normal operation
Red Flashes at 0.5 Hz during start-up
Yellow Flashes at 0.5 Hz if power sup-
Table 5-1
the voltage to 0.5V, which indicates the MRLDS should be be replaced. Call the CPC Service Department (770-425-
2724) to verify if the MRLDS unit should be replaced.
- MRLDS LED Status
For analog output models, a fault is signaled by setting
STATUS INDICATION
Turns ON solid if concentration reading exceeds 50 ppm
plied is outside set limits Turns ON solid during other fault conditions

5.2 E2 Alarming

5.2.1 IRLDS Mode

If any one or all of the MRLDS sensors encounters a problem, the IRLDS application will alarm and all cell outputs will show NONE. For details on which individual unit is in alarm, go to the MRLDS Gateway and check the Status scr een on the HHT.

5.2.2 16AI Mode

If an MRLDS has lost communication, the input will go to 1250 PPM, which should force an alarm if enabled. If all MRLDS sensors lose communication, the 16AI will go offline. Check the Status screen on the HHT for details.
14MRLDS I&O Manual 026-1307 Rev 1 11-30-07
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