Lamarche Option 21Q Manual

106 Bradrock Dr. Des Plaines, IL 60018-19671
Instruction Drawing Number: P25-LOPT21Q-DCES-225C-1
Tel: [phone]
Fax: [phone]
CPN 140620
Revision A00
Rev. Date: 05/19
ECN: 21824-2
This manual is only valid for DCES AND ARBS units
equipped with the S2A-383S-2X00 communications card
and 225C software version P225C7001_050819
La Marche Manufacturing Company | www.lamarchemfg.com
MODBUS SCADA Interface
for DCES and ARBS with S2A-225C
Option 21Q
Setup Instructions

2
Default Settings
The LaMarche Communications Card is shipped with the following default settings;
Port: RS232
Baud Rate: 9600
Data Bits: 8
Stop Bits: 1
Parity: None
Board Configuration
The communications card may be configured for RS232, RS485 or TCP communications.
SW2 configures the board for either Serial or TCP/IP communications.
SW4 configures the board for either RS232 or RS485 communications.
SW3 configures the BIAS and Termination Resistor(s) when using RS485.
The photo below shows the location of the dipswitches of the communications board.
Setting the Modbus Address, Baud Rate & Parity
To change the Address, Baud Rate and Parity you need to enter the customer calibration mode. It is important
to note that when using the TCP/IP port it is necessary to set the Address = 1, Baud Rate = 9600 and Parity =
NONE. For RS232 and RS485 applications these can be set as required.

3
RS232 & RS485 Serial Applications
To configure the card for Serial applications you need to configure the board’s dipswitches and set the Address,
Baud Rate and Parity as required in the customer calibration mode.
TCP/IP Applications
To configure the card for TCP/IP applications you need to configure the boards dipswitches and confirm the
Address = 1, Baud Rate = 9600 and Parity = NONE in the customer calibration mode.
You will also likely want to change the IP, Subnet and Gateway. To accomplish this please refer to the next
section.
Changing the TCPIP Settings
The RTU to TCP/IP module is set at the factory as follows:
IP Address: 192.168.0.6
Netmask: 255.255.255.0
Gateway: 192.168.0.1
TCP Port Number: 502
To change the TCPIP settings it is necessary to load and install the DeviceInstaller Software provided by
Lantronix Inc. from the following URL:
http://www.lantronix.com/device-networking/utilities-tools/device-installer.html
Once this software is installed you should reconfigure your Network Adaptor to the same subnet (see default
settings above) as the Lantronix device. Connect the device to your laptop/PC using a null-modem for a direct
connection. Use a straight through if connecting through a switch or hub. If the device is powered when you
run the DeviceInstaller it will automatically begin a search and find the device. If DeviceInstaller is running
when the device is connected the Search command on the Toolbar Menu will locate the device. Once the
device is located, the screen should appear as pictured below.

4
To assign the desire IP settings press the Assign IP button on the Toolbar. This will bring up the following
screen:
The Device Identification is located on the device itself as described in the dialog text above. An example of the
Lantronix device is pictured below.
In the example above the Device Identification would be 00-20-4A-C4-DF-E8. Note this is unique to each
device. After entering the ID press Next.

5
This dialog presents a choice between assigning an IP dynamically which would allow the device to operate on a
network with a DHCP server however it is recommended that a specific IP address be assigned so it can be
referenced directly on a SCADA Network.
Selecting “Assign a specific IP address” will bring up the following dialog:
Enter your desired IP settings and press Next.

6
Pressing Assign will start the process of programming the device to the new IP Settings.
A progress bar and Status will appear indicating a successful operation as shown below:
Pressing Finish will complete the IP setting change process. The DeviceInstaller Application can now be closed.

7
LaMarche ARBS Modbus Implementation
Supported Modbus Types
RTU
TCP
Supported Modbus Function Codes
02 -- Read Discrete Input Registers
03 –Read Holding Registers
04 –Read Input Registers
02 - Discrete Inputs
Address
Name/Description
10000
DC1 Low Voltage Alarm Indicator (FAILURE=1)
10001
DC2 Low Voltage Alarm Indicator (FAILURE=1)
10002
DC1 Relay Indicator (DE-ENERGIZED=1)
10003
DC2 Relay Indicator (DE_ENERGIZED=1)
03 –Holding Registers
Address
Description, Units, Valid Settings/Range
Scale Factor
40000
Operating Mode, None,
DC1 Only Mode = 1
DC2 Only Mode = 2
DC1 and DC2 Mode = 3
Cycling Mode = 4
None
40001
Cycling Mode, Days, 1 7 14 21 30
None
40002
DC1 Low Voltage Alarm Delay, Seconds, 0 to 255
None
40003
DC1 Low Voltage Alarm Threshold, Volts, 0 to MAXV
0.1
40004
DC1 Low Voltage Alarm Reset, Percent, 0 to 100
None
40005
DC2 Low Voltage Alarm Delay, Seconds, 0 to 255
None
40006
DC2 Low Voltage Alarm Threshold, Volts, 0 to MAXV
0.1
40007
DC2 Low Voltage Alarm Reset, Percent, 0 to 100
None
04 –Input Registers
Address
Description, Units
Scale Factor
30000
Heartbeat. Increments continuously to indicate communications
are working.
None
30001
Board Number. Will read 225 for 225C card.
None
30002
Software Version, Version of software on 225C card.
None
30003
DC1 DC Voltage, Volts
0.1
30004
DC2 DC Voltage, Volts
0.1

8
04 –Input Registers
Address
Description, Units
Scale Factor
30005
Max Set Voltage (MAXV), Volts (3.0vpc * Cells)
Upper Limit For BT1 & BT2 Low Voltage Alarm Settings
0.1
30006
DCA –DC Current,
0.1