Metrix DATAWATCH IX Modbus User manual

DATAWATCH IX Modbus
User Manual
Doc# 1870872 • REV A (January 2019)
This manual provides the procedure and instrucon to remotely access Metrix
DATAWATCH through Modbus over TCP/IP.

Doc# 1870872 • REV A (January 2018) Page 2 of 7
Setup DATAWATCH
1.1 Log on the DATAWATCH with Engineer access level, type password 100
1.2 Go to Network\Modbus menu

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1.3 Make sure Address is 1, Unit ID Enable is Loose, and Serial Mode is Modbus
Slave. Change to these sengs if they aren’t.
1.4 Write down the IP Address of DATAWATCH from Network\Interface menu for
later use by Modbus server

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1.5 Change the resoluon of the registers so that you can read them in the proper
decimal numbers you want.
2 Test Modbus communicaon from Modbus scanner soware
2.1 Install the Modbus scanner soware in your computer and run it
2.2 Add TCP connecon using the DATAWATCH IP address and Port number

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2.3 Create Slave Device with the ID that matches DATAWATCH seng
2.4 Add request to the DATAWATCH Modbus slave. The funcon can be either Hold-
ing resisters or Input registers. The Oset is the register address that can be found
from DATAWATCH Modbus map. The Length is how many bytes the register contains.

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2.5 Highlight the request, and click Poll buon. The register will be read and dis-
played out.
2.6 In the Modbus register map, you can nd the register type and address. If the
register type is unit8, its length is 1. If the type is oat32, its length is 4.
2.7 The register address from the map is canonical address for raw data in integer
type. For instance, you read a oat type of register from address 264, the unpro-
cessed reading is 501785684……., but the actual value should be a oat number
5.01785684. To get this processed oat type of value, you need calculate the nave
address by using the formula (integer address x 2 + 0x8000). This is specied in the
Modbus map manual.
2.8 If you use the actual address in the Modbus scanner soware, you will get the
actual value of the true type.
Channel.3.Main.Type Species the type of channel uint8 0X1900 6400 N/A RW
Channel.3.Main.PV The process variable (output) of the
channel
oat32 0X0108 264 Set by
Chanel.3.Main.
Resoluon
RO
Channel.3.Main.Status The PV (output) status uint8 0X0109 265 N/A RO

Doc# 1870872 • REV A (January 2018) Page 7 of 7
2.9 Create a chain of requests to scan all the registers you want to poll from DA-
TAWATCH.
2.10 Create register chain in your PLC conguraon soware and start to monitor or
control the parameters in your applicaon.
The most common registers if 8 channels are used, please consult Metrix customer service for any ques-
on.
Parameter Descripon Type Address
(Hex)
Address
(Decimal)
Channel.1.Main.Measured Value Measured value oat32 0X1814 6164
Channel.1.Main.PV The process variable (output) of the channel oat32 0X0100 256
Channel.1.Main.PV2 The secondary input process variable (ouput) of
the channel
oat32 0X0110 272
Channel.2.Main.Measured Value Measured value oat32 0X1894 6292
Channel.2.Main.PV The process variable (output) of the channel oat32 0X0104 260
Channel.2.Main.PV2 The secondary input process variable (ouput) of
the channel
oat32 0X0114 276
Channel.3.Main.Measured Value Measured value oat32 0X1914 6420
Channel.3.Main.PV The process variable (output) of the channel oat32 0X0108 264
Channel.3.Main.PV2 The secondary input process variable (ouput) of
the channel
oat32 0X0118 280
Channel.4.Main.Measured Value Measured value oat32 0X1994 6548
Channel.4.Main.PV The process variable (output) of the channel oat32 0X010c 268
Channel.4.Main.PV2 The secondary input process variable (ouput) of
the channel
oat32 0X011c 284
VirtualChannel.1.Main.ModbusInput Modbus input value oat32 0X1c06 7174
VirtualChannel.2.Main.ModbusInput Modbus input value oat32 0X1c86 7302
VirtualChannel.3.Main.ModbusInput Modbus input value oat32 0X1d06 7430
VirtualChannel.4.Main.ModbusInput Modbus input value oat32 0X1d86 7558
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