026-1307 Rev 3 06-APR-2010
Modular Refrigerant Leak Detection
Sensor (MRLDS) Installation and
Operation Manual
3240 Town Point Drive NW Suite 100
Kennesaw, GA 30144, USA
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.
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 SPECIFICATIONS ............................................................................................................................................................. 1
1.2 MRLDS MODELS .......................................................................................................................................................... 1
1.3 POWERING THE MRLDS............................................................................................................................................... 1
2 CHOOSING A MOUNTING LOCATION ................................................................................................................. 2
2.1 MOUNTING THE SENSOR ............................................................................................................................................... 2
2.2 MRLDS DIMENSIONS.................................................................................................................................................... 3
3 MRLDS ANALOG VERSION (809-100X).................................................................................................................. 3
3.1
3.2
3.3
3.4
NETWORK LAYOUT .......................................................................................................................................................
MRLDS WIRING ...........................................................................................................................................................
REFRIGERANT JUMPER SETTINGS ..................................................................................................................................
CONTROLLER SETUP FOR ANALOG MRLDS ................................................................................................................
3
3
4
4
4 MRLDS MODBUS VERSION (809-101X).................................................................................................................. 5
4.1
4.2
4.3
4.4
NETWORK LAYOUT ....................................................................................................................................................... 5
MRLDS SETUP .............................................................................................................................................................. 5
MRLDS GATEWAY ....................................................................................................................................................... 7
CONTROLLER SETUP FOR MODBUS MRLDS .............................................................................................................. 11
5 DIAGNOSTICS............................................................................................................................................................ 14
5.1 MRLDS LED INDICATORS ......................................................................................................................................... 14
5.2 E2 ALARMING ............................................................................................................................................................. 14
5.3 LINEARITY SETTINGS FOR SUPPORTED REFRIGERANTS .............................................................................................. 15
MRLDS I&O Manual
Table of Contents • v
1
Overview
Retail Solutions 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
Power Requirements
24 VAC, ±20%, 50/60 Hz, Class 2
Wiring
14 AWG max, Class 2 copper wiring
Power Consumption
Less than 2.7 watts
Output Options
Figure 1-1 - Sensor Base Opening With Screw Terminals
1.2
MRLDS Models
Part Number
Description
809-1000
Voltage Out w/o de-icer*
1-5V, 10 K Ohm load
RS485 Modbus RTU
809-1001
Voltage Out with de-icer*
809-1010
Modbus w/o de-icer*
32 to 149°F (-22 to 149°F with
de-icer*)
0 to 65°C (-30 to 65°C with
de-icer*)
809-1011
Modbus with de-icer*
Table 1-2 - Available MRLDS Models
Humidity
0 to 99% non-condensing
Size
4.5” x 3.5” x 1.6”
1.3
Weight
.35 lbs. (160 g)
Pollution Degree
2
Installation Category
II
Range
0 to 1000 PPM
Minimum Detection
25 PPM
Pressure
Operating 10.2 to 15.7 PSIA
Repeatability
±10 PPM at 50 PPM
Linearity
See Table 5-2, “- Linearity Settings
for Supported Refrigerants,” on
page 15
Warm-up Time
30 minutes
Operating Temp.
Table 1-1 - MRLDS Unit Specifications
*De-icer: for environments below 32°F to keep ice from
forming on the surface of enclosure.
Specifications
Powering The MRLDS
Part Number
Transformer
Description
Number of
MRLDS Units
Powered
640-0039
24VAC, 10VA
Class 2
Up to 3
Table 1-3 - MRLDS Transformer Specifications
The MRLDS unit requires a separate UL Listed/CSA
Certified 24VAC Class 2 transformer power supply. One
24VAC, 10VA Class 2 transformer is sufficient for up to
three (3) MRLDS units.
Retail Solutions supplies several sizes of transformers
for powering multiple MRLDS units (three or more). Note
that polarity must be maintained when connecting more
than one MRLDS to a single transformer.
WARNING: The MRLDS unit must be always
be powered by either a suitable UL 60950/CSA
Certified power supply that is isolated from line
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.
Overview • 1
If a transformer is
shared between MRLDS
units, the “ACN” of each
MRLDS must be
wired to the same phase
of the transformer.
120VAC
Tr
MRLDS I
MRLDS II
er 24VAC
rm
o
sf
an
ACN
Figure 1-2 - Powering Multiple MRLDS Units
2 Choosing a
Mounting Location
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.
Proper location of the refrigerant sensor is necessary to
ensure accurate measurement of representative air samples.
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.
Mount the sensor:
•
Indoors, inside a room area where air circulates
freely.
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
•
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 0°C),
unless using a model with a de-icer.*
ground terminal labeled
. Connect to earth
ground with 14 AWG wire that is less than 6
inches.
•
Near heat sources, such as appliances, direct
sunlight, or concealed pipes or chimneys.
5.
Align the two side tabs of the cover with the base
and snap the cover onto the base.
•
On walls subject to excessive vibration.
6.
•
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.
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: 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.
2 • MRLDS I&O Manual
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.
026-1307 Rev 3 06-APR-2010
3 MRLDS Analog
Version (809-100x)
3.1
Network Layout
E2
s
r vice
he
Ot t De
To Ne
O
I/
Figure 2-2 - Attaching and Removing Cover
I/O Net
2.2
MRLDS Dimensions
MultiFlex Board
MRLDS Units
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
MULTIFLEX BOARD LOWER RIGHT CORNER
ACN
24VAC
GAS(+)
OUT(V)
ANALOG MRLDS INSIDE LOWER PORTION
OF BASE
1
0V
3
2
0V
SIG
BELDEN
8761
Figure 2-3 - MRLDS Mounting Dimensions
4
SIG
INPUT 14
OUT(V)
TO 24VAC, 10VA
CLASS 2 POWER
SUPPLY
Ground
SIG
0V
Ground
INPUT 13
5
0V
6
SIG
INPUT 15
7
0V
8
SIG
INPUT 16
A transformer must
never be shared
between MRLDS
and the MultiFlex
BELDEN board. A separate
8761
transformer must
be used.
If a transformer is
shared between
MRLDS units,
the “ACN” of
each MRLDS
must be wired
). to the same
phase of the
transformer.
EARTH SHIELD
NEAR THE MULTIFLEX
BOARD. DO NOT CONNECT
THE SHIELD TO THE 0V INPUT
ON THE MULTIFLEX BOARD.
Wire MultiFlex SIG to MRLDS OUT(V).
Wire MultiFlex 0V to MRLDS Ground (
Figure 3-2 - Analog MRLDS Wiring
MRLDS Dimensions
MRLDS Analog Version (809-100x) • 3
3.3 Refrigerant Jumper
Settings
5.
Select the board/point input.
6.
Press F1 Setup.
7.
Select Analog Sensor.
The jumper settings for refrigerant types are located on
the label inside the MRLDS sensor cover (shown in Figure 1-1). Set the jumpers according to how they are indicated on the label.
8.
On the Analog Input screen, select MRLDS
Refr. as the Sensor Type. The parameters are
then automatically configured for you.
9.
Press the  (Back) button to save changes.
The MRLDS supports ten 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.
Analog Jumpers
J2
If the device is configured and powered correctly, a
value will be visible under the Value column on the Input
Status screen.
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:
J1
J2 J1
refrigerant
type
jumpers
Figure 3-3 - Analog Jumper Layout (Inside Lower Portion of
Cover) Enlarged To Show Detail
Refrigerant Type
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
J2|J1
•Low End Point: 0.8V
R-22
•Low Eng. Units: -50
R-134a, R-407A, R-407C,
R-410A, R-427A
•Select Eng. Units: PPM
R-404A, R-422A, R-422D,
R-507
•High Eng. Units: 1125
•HighEnd Point: 5.5V
•Low End Limit: -100
Table 3-1 - Refrigerant Jumper Settings
3.4 Controller Setup For
Analog MRLDS
3.4.1
E2 Controllers Version 2.5
and Newer
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.
4 • MRLDS I&O Manual
•HighEnd Limit: 1150
(Set the alarm failure to < -10PPM.)
8.
Press the  (Back) button to save changes.
If the device is configured and powered correctly, a
value will be visible under the Value column on the Input
Status screen.
026-1307 Rev 3 06-APR-2010
4.2
MRLDS Setup
4.2.1
MRLDS Wiring
RS485 (-)
RS 485 (+)
MODBUS
NETWORK
Figure 3-4 - Analog Input Screen Settings Example for E2
3.4.3
BELDEN
8761
RMCC Controllers
To Gateway
Board
EARTH GND
ACN
24VAC
MODBUS
MRLDS - INSIDE LOWER
PORTION OF BASE
14 AWG less
than 6 inches
Shield
drain/ground
wire
For RMCC-type controllers, set the Gain parameter to
250 and Offset to -1000.
4 MRLDS Modbus
Version (809-101x)
4.1
Network Layout
A transformer must
never be shared
between MRLDS
and the Gateway
board. A separate
transformer must
be used.
If a transformer is
shared between
MRLDS units,
the “ACN” of
each MRLDS
must be wired
to the same
phase of the
transformer.
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
J6
- +
J1
Gateway
MODBUS
+
+
-
MRLDS
MRLDS
+
-
MRLDS
+
-
MRLDS
(Up to 12 MRLDS
units on the network
per Gateway)
J6 J5 J4 J3 J2 J1
term
jumper
network
address
jumpers
refrigerant
type
jumpers
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
Modbus Address
Jumper Settings
the J2 or J1 sockets respective per the inside label.
J5|J4|J3
J6
J1
100
J6 J5 J4 J3 J2 J1
term
jumper
No jumpers installed
network
address
jumpers
101
102
refrigerant
type
jumpers
Figure 4-4 - Modbus Jumper Layout (Inside Lower Portion of
Cover) Enlarged To Show Detail
103
104
Refrigerant Type
J2|J1
R-22
105
106
R-134a, R-407A, R-407C,
R-410A, R-427A
107
R-404A, R-422A, R-422D,
R-507
108
Table 4-2 - Refrigerant Jumper Settings
109
NOTE: When using the MRLDS Gateway, it
will only show the base refrigerant type selections (R-22, R-134a, R-404A).
110
111
Table 4-1 - MRLDS Modbus Address Jumper Settings
4.2.4
Refrigerant Jumper Settings
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, set jumper JP6 for termination.
The jumper settings for refrigerant types are located on
the label inside the MRLDS sensor cover (shown in Figure 1-1). Set the jumpers according to how they are indicated on the label.
The MRLDS supports ten different refrigerant types.
Select the desired refrigerant type by setting one jumper to
6 • MRLDS I&O Manual
026-1307 Rev 3 06-APR-2010
Factory
Mode
4 (Lsb)
J6
Trouble
Mode
8 (Lsb)
J1
Termination
jumper
J6 J5 J4 J3 J2 J1
Figure 4-5 - MRLDS Termination (Inside Lower Left of Cover)
4.2.6
Modbus Output
Fault and
Module
State
PDU
Address
0x0000
Logical
Address
1
0x0001
2
0 to 40
Gas Concentration
0x0002
3
-20 to 1050
(PPM)
Gas
Numbers
R-22 = 6
R-404A = 27
R-134a = 15
Table 4-3 - RS485 Output Specifications
See Table 4-3 below for Modbus registers in the
MRLDS Unit. Baud rate: 19,200; each byte is 8 (eight)
bits with no parity and 2 (two) stop bits.
Register
Name
Gas
Number
Range
Under Range
2 (msb)
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).
Under Voltage 8 (msb)
Temperature
10 (msb)
SELECT I/O NET MODE
OFF = IRLDS
ON = 16AI
Lamp Fail
40 (msb)
Test Mode
80 (msb)
Warm Up
Complete
0 (Lsb)
ON
Cal/Setup
2 (Lsb)
Table 4-3 - RS485 Output Specifications
OFF = IRLDS
ON = 16AI
Figure 4-6 - I/O Network Modes
4.3.2
Gateway Connections
Up to 12 MRLDS units may be connected to the Gate-
MRLDS Gateway
MRLDS Modbus Version (809-101x) • 7
way 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
Figure 4-8 shows how to connect the 56VA and 80VA
transformers to the Gateway power connector.
Three-Board
P/N
Power Rating
Six-Board
640-0056
640-0080
56 VA
80 VA
Table 4-5 - Power Ratings for CPC Transformers
Figure 4-7 - MRLDS Gateway Board Layout (810-3040)
Figure 4-8 - Pinout for the 56VA (640-0056) and 80VA (6400080) Transformers
CAUTION: Before installing the Gateway
board, verify that jumper JP7 (if present on 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
Board
Powering the Gateway
Input Voltage
24VAC, Class 2, Center-Tapped
50/60Hz
Power
5VA
Table 4-4 - Gateway Power Requirements
The Gateway board requires 24VAC power from a
Class 2 center-tapped transformer. Retail Solutions supplies several sizes of center-tapped transformers for powering multiple 16AIs, 8ROs, and other RS485 peripheral
boards.
8 • MRLDS I&O Manual
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 board
as shown in Figure 4-9. For further information about
how RS485 networks are configured, refer to your site
026-1307 Rev 3 06-APR-2010
controller’s user manual.
GATEWAY BOARD
RS485 I/O NET
TERM JUMPERS
-485
0v
+485
RS485
I/O NET
(TO CPC
CONTROLLER)
TERMINATION
(ALWAYS
TERMINATE)
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.
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.
To MRLDS
MODBUS
GATEWAY BOARD
-485
0v
+485
MRLDS - INSIDE LOWER
PORTION OF BASE
Shield drain/
ground
wire
-485
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.
MODBUS
NETWORK
EARTH GND
ACN
24VAC
B
RS 485RS 485+
A
0v
+485
Shield
drain/ground
wire
I/O NET MODE
ON = 16AI
OFF = IRLDS
Figure 4-10 - Connecting the Gateway to MODBUS
4.3.7
Termination Settings
ADDRESS ON
I/O NET
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.
To 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).
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).
I/O ADDR:
I/O BAUD:
MOD BAUD:
FAIL
I/O NETWORK OR
COM A AND D
BAUD RATE
(GW to E2)
1
2
3
4
5
6
7
8
ON
OFF = 9600 BAUD ON
MODBUS
ON = 19200 BAUD ON
MODBUS
(GW to MRLDS)
I/O NET BAUD RATE SETTINGS
9600
19200
ALWAYS USE
19200 BAUD
WITH MRLDS
I/O NET
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
GATEWAY
DIP SWITCH
1
9600
19200
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
FAIL I/O NET
Figure 4-16 - Select Screen
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
)
FAIL I/O NET
4.3.10.3
Status Screen
1 - The Status screen displays general status information 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 Retail Solutions 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.
Figure 4-14 - MRLDS HHT Home Screen
• OFFLINE - MRLDS has lost communication.
4.3.10.1
• UNUSED - This address is not being used.
MRLDS Setup
From the HHT Home screen (F1), press the down
arrow key to navigate to the Baud Rate/Address screen
(Figure 4-15).
10 • MRLDS I&O Manual
• FAIL - MRLDS has reported a fail state. Check the
ALM field for specification.
026-1307 Rev 3 06-APR-2010
4.3.11 Gateway Troubleshooting
100:
GAS:
ST:
ALM:
FAIL
CNT: 1
R134A
NORMAL
NONE
I/O NET
Figure 4-17 - Status Screen
NOTE: If the HHT displays any type of alarm,
contact the Retail Solutions Service Department
(770-425-2724) to verify if the MRLDS unit
should be replaced.
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:
FAIL I/O NET
Figure 4-18 - Setup/Online Screen
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 screen displays the address
of the MRLDS unit with its associated firmware revision.
100:
102:
103:
104:
FAIL
ENABLE 1.12
---------------I/O NET
Figure 4-19 - Firmware Revision Screen
Controller Setup for Modbus MRLDS
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 screen 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  (Back) button and select
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.
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 under
I/O Net Devices.
6.
Press the  (Back) button and select
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 number of 16AI boards to equal the number of MRLDS Gate-
MRLDS Modbus Version (809-101x) • 11
4.4.4
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
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 CONFIGURATION 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.
• High Eng. Units: 1200.0000
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.
Figure 4-20 - Analog Input Screen Settings Example for E2
5.
Press 0 (zero) to go back to the CONFIGURATION 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 number of IRLDS II controllers plus the real number of 16AIs
= 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
12 • MRLDS I&O Manual
026-1307 Rev 3 06-APR-2010
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
4.4.5.1
BEC and RMCC Controllers
Less Than Version 2.1
Input Definitions
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
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 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
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
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.
5
Diagnostics
5.1
MRLDS LED Indicators
Gain and Offset
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 setpoint 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.
14 • MRLDS I&O Manual
The MRLDS has three LEDs for quick status indication.
MRLDS
LEDs
STATUS INDICATION
Green
Lights during normal operation
Red
Flashes at 0.5 Hz during start-up
Turns ON solid if concentration
reading exceeds 50 PPM
Yellow
Flashes at 0.5 Hz if power supplied is outside set limits
Turns ON solid during other fault
conditions
Table 5-1 - MRLDS LED Status
For analog output models, a fault is signaled by setting
the voltage to 0.5V, which indicates the MRLDS should be
be replaced. Call the Retail Solutions Service Department
(770-425-2724) to verify if the MRLDS unit should be
replaced.
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 screen 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.
026-1307 Rev 3 06-APR-2010
5.3
Linearity Settings for Supported Refrigerants
Factors such as air movement and the proximity of the sensor to the leak will usually have a greater influence on the
reading (Rdg) than the differences in the linearity (accuracy) of the various supported refrigerants, so the alarm limits
should not have to be adjusted. However, depending on the refrigerant selection, you may want to fine tune the alarm limit
by increasing the limit for the refrigerants with linearity ranges in the 25-50 PPM range that are greater than +/- 10 PPM
to avoid alarming at too low of a count.
If the linearity range is greater than +/- 10 PPM you would increase the alarm limit by the amount it is above +/-10
PPM. For example, if your were using R-410A you may want to increase the alarm limit by 5 PPM, so an alarm limit for
R-410A of 40 PPM would be increased to 45 PPM.
Linearity
R-22
R-134a R-404A R-407A R-407C R-410A R-422A R-422D R-427A
R-507
25-50 PPM
+/-10
PPM
+/-10
PPM
+/-10
PPM
+/-15
PPM
+/-17
PPM
+/-15
PPM
+/-12
PPM
+/-15
PPM
+/-15
PPM
+/-17
PPM
60-1000
PPM
+/-20%
of Rdg
+/-20%
of Rdg
+/-20%
of Rdg
+/-30%
of Rdg
+/-45%
of Rdg
+/-30%
of Rdg
+/-25%
of Rdg
+/-30%
of Rdg
+/-30%
of Rdg
+/-45%
of Rdg
Table 5-2 - Linearity Settings for Supported Refrigerants
Linearity Settings for Supported Refrigerants
Diagnostics • 15