MVI56-LTQ PROSOFT master-slave network interface module


Application port for ControlLogix device connection to power supply and MVI56-LTQ module

Category: SKU: MVI56E-SIE-1 Tag:
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MVI56-LTQ Opening the Sample Ladder Logic

The sample program for your MVI56-LTQ module includes custom tags, data types and ladder logic for data I/O and status monitoring. For most applications, you can run the sample ladder program without modification, or, for advanced applications, you can incorporate the sample program into your existing application.

The inRAx Solutions CD provides one or more versions of the sample ladder logic. The version number appended to the file name corresponds with the firmware version number of your ControlLogix processor. The firmware version and sample program version must match.


MVI56-LTQ Downloading the Sample Program to the Processor

1 If you are not already online with the processor, open the Communications menu, and then choose DOWNLOAD. RSLogix 5000 will establish communication with the processor. You do not have to download through the processor’s serial port, as shown here. You may download through any available network connection.

2 When communication is established, RSLogix 5000 will open a confirmation dialog box. Click the DOWNLOAD button to transfer the sample program to the processor.

3 RSLogix 5000 will compile the program and transfer it to the processor. This process may take a few minutes.

4 When the download is complete, RSLogix 5000 will open another confirmation dialog box. If the key switch is in the REM position, click OK to switch the processor from PROGRAM mode to RUN mode.


The configuration object LTQCfg contains all the configuration information required by the module. Fill in the members of this object to set the parameters required for each application. This data set will be transferred from the processor to the module each time a restart (warm or cold boot) operation is requested.

Configuration of the module is performed by filling in the values in the module object defined in the Controller Tags Edit Tags dialog box. Each parameter required by the module has a defined location in the object. The following table describes the structure of the object.

MVI56-LTQ Name Data Type Description
BaudRate INT Baudrate for port (110 to 115.2K)
MsgRespTm INT Message Response Timeout
MaxSlaves INT Maximum number of slaves to consider
BTRMax INT Maximum BTR block count
BlkDelay INT Block transfer delay counter
LastState INT State for slave data on comm failure
NetPoll INT Network polling scheme (0=A/B, 1=A, 2=B)
PropDelay INT Propagation delay for messages
RTSOn INT RTS to TxD delay (milliseconds)
SpecPolling INT Special polling used (0=No, 1=T-MID, 2=Reg 6/7;
other numbers of the range 1 to 65535 refer to the
corresponding register).
Use_CTS INT Monitor CTS line (0=No, 1=Yes)
BlkFailCnt INT Number of failed transfers before COM shutdown
ActiveSlaves INT[10] Array to set active slaves (1-bit/slave)

MVI56-LTQ Product Introduction:
Linear measurement range: 0-120% nominal input
Overload capacity: Through core input, 30 times nominal input, lasting for 5 seconds; Wiring input, 10 times nominal input, lasting for 5 seconds
Frequency response: 20H7~5KHZ, especially suitable for measuring power frequency signals (50Hz, 400Hz)
Anti interference capability: Protective sensors are suitable for harsh interference environments
Common mode rejection ratio: 60dB (at 50KHz)
Input output isolation capacitance: 50pF (at 1KHz)
Isolation voltage:>3kV/50Hz/1min
Multiple output characteristics and structural forms are optional
Working environment temperature: -20 ℃~80 ℃
Storage environment temperature: -25 ℃~85 ℃