The MESR901 Modbus Gateway is built for use in industrial environments. It features a slim IP30 DIN rail mountable case, 1 Ethernet port, and 1 Serial port. Modbus 1 Driver FAQ (obsolete) Subject to change without notification. This document responds to the frequently asked questions concerning the Engiby Modbus 1 Driver (versions 1.xx). Attention : The Modbus 1 library is acually. Modscan32 is a low-cost Modbus master software application used to configure and test Modbus based devices and log data in integer and floating point formats.
Serial ports can be accessed over a LAN or WAN using Direct IP Mode connections. Supporting up to 1. Easy- to- use software is designed for Windows 2. Server, XP, Vista, 2.
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Server and Windows 7. Serial data rates up to 2. Featuring a slim IP3.
DIN rail mountable case, the MESR9. DC power supply voltages and have pluggable terminal block connectors. An external power supply, sold separately, is required. MESR9. 01 units have one Ethernet port. B& B Electronics’ Vlinx.
It can acquire data in integer, unsigned decimal, and floating point formats. It also supports register writes.
The slave response time and delay between polls are user selectable. Please contact the manufacturer directly for information on their various versions and pricing.
More details may be found at the following links. Modscan. 32 is available in a couple of different versions.
Contact Win. TECH Software Design to purchase this software. The cost is $6. 5 for the single- user basic version; or $1. Professional version that includes MMI (e. Ocean Controls approach of setting up individual tags which is more tedious and time- consuming). The non- standard data format requires using Excel's Import Wizard which takes more steps. However, there is a work- around for this (see csv. Difficult to set up and change.
No Linux or Apple OS version is available. It can also write to registers to configure settings in Modbus slaves. The free demo version can be useful for isolating the cause of problems when a customer is using another third- party Modbus master program that is misconfigured or that has a software bug by allowing them to compare the readings acquired with their software versus the readings acquired with Mod. Scan. 32. Mod. Scan. Since the demo version can be freely distributed, an installer can use it for the minute or two that it takes to configure the CT amps ratings via the Watt.
Node meter's Ct. Amps registers and to verify that the Modbus communications is working. Mod. Scan. 32 can communicate with the Modbus Watt. Node meter using SDAs that support RS- 4. To eliminate the time limit, the demo can be registered by entering a license key obtained from Win. Tech. As of Q3 2.
Pro version costs $1. Both versions of Mod. Scan. 32 support viewing and updating numeric register values and capturing data to text files that can be imported into spreadsheet programs like Excel. The Pro version includes additional features that support viewing the data as trend lines on simple graphical charts and exporting data to OLE client programs. Installing it is as simple as downloading the free demo Modscan.
Note that most USB/RS- 4. USB host and do not require an external power supply.
Usually it will include . Note the COM port number that Windows assigned to the device. Enter the Watt. Node meter's slave address (set with the DIP switches) in the . For example if the meter's DIP switches 2 to 7 are off and 1 is on, enter a value of 1. This selects the global CT Amps register Ct. Amps and the CT Amps registers for each of the three phases (Ct. Amps. A, Ct. Amps.
B, and Ct. Amps. C). No hardware flow control is needed for most USB/RS- 4. Enter the CT rating in amps and click . The dialog will close and the displayed value of the corresponding CT Amps register should change accordingly. Mod. Scan. 32 saves this configuration data in special . Each document window displays register data of the same type and format (floating point or 1.
These files are preconfigured for acquiring the specific registers containing the Watt. Node meter data and assume that the meter is assigned a slave address of 1 and that its baud rate is set to 1.
The Watt. Node. Auto. Start. tst Auto- start configuration file assumes that the USB/RS- 4. PC's COM1. 0 serial port (this can easily be changed as described below).
The contents of the Modscan. For. Watt. Node. zip file should be copied to the same folder, . Upon launching, Modscan.
In that case, you need to tell Modscan. COM port to use by clicking the Connection menu bar item and selecting the . A dialog box that appears with a .
After you've selected the right port, click OK and Modscan. Watt. Node meter and updating the displayed documents after a few seconds.
Integer register 1. CT amps register which allows you to set the CT rating for all three phases if they all have the same rating.
In cases where differently rated CTs are used on each phase, registers 1. CT amps rating for phases A, B and C respectively. If any phase inputs are not used and are left unterminated (no shorting wire) then they can cause small but unwanted energies to be accumulated due to stray electrical fields. This can be prevented by setting their CT amps register to zero, including the global CT amps register (Note: The phase LEDs may still occasionally flash red but no energy is accumulated if the Ct. Amps register is zero). After entering the new value, click the .
This is done by clicking on the document to bring it to the foreground and then selecting . After specifying the file name, another dialog will appear that lets you choose how often to archive the data. To stop collecting Watt. Node data, select . Note that you can specify a different data file name and start and stop logging data separately for each document. To import a captured text file with Excel, select .
A dialog will appear that lets you tell Excel exactly how to import the data. The csv. exe utility processes a data file you previously captured with Modscan. CSV format that Excel automatically recognizes.