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--> It is essential that you follow the application instructions for incremental encoders.

The Irinos Box SC-INC is suitable for connecting 4 incremental encoders.

Each input can be configured via software for either 1Vpp incremental encoders or TTL / RS422 incremental encoders. The current input configuration is indicated by LEDs next to the connector. The configuration can be changed in the following ways:

oVia the Irinos Tool. Please refer to the Irinos Tool user manual for further details.

oVia a configuration command in the measurement computer software.

Depending on the variant, the inputs are preconfigured at the factory for either 1Vpp or TTL/RS422.

 

Switching between 1Vpp and TTL/RS422 is carried out via the DLL interface.

 

With the NmxDLL, the switch to 1Vpp is performed via NMX_ChannelSetConfig_1, e.g.:

char acStrTx[] = "#1VSS;1#";

NMX_ChannelSetConfig_1(pHandleNmx, 2, acStrTx, strlen(acStrTx), acStrRx, sizeof(acStrRx), &ulRxSize);

 

And conversely, switching to TTL with quad evaluation:

char acStrTx[] = "#TTL4X;1#";

NMX_ChannelSetConfig_1(pHandleNmx, 2, acStrTx, strlen(acStrTx), acStrRx, sizeof(acStrRx), &ulRxSize);

 

Or to TTL with 1-fold evaluation:

char acStrTx[] = "#TTL;1#";

NMX_ChannelSetConfig_1(pHandleNmx, 2, acStrTx, strlen(acStrTx), acStrRx, sizeof(acStrRx), &ulRxSize);

 

 

With the MscDLL, the switch to 1Vpp is performed using opcode 0x09 and the MSC_WriteCommand function:

pSndBuffer = „#T8;1VSS;1#“;  // Example for probe 8 à Adapt T8 to your probe number

MSC_WriteCommand(pHandle, 0x09, SndBufferSize, pSndBuffer, RcvBufferSize, pRcvBuffer, pBytesReceived, Timeout);

 

And conversely, switching to TTL with quad evaluation:

pSndBuffer = „#T8;TTL4X;1#“;

MSC_WriteCommand(pHandle, 0x09, SndBufferSize, pSndBuffer, RcvBufferSize, pRcvBuffer, pBytesReceived, Timeout);

 

Or to TTL with 1-fold evaluation:

pSndBuffer = „#T8;TTL;1#“;

MSC_WriteCommand(pHandle, 0x09, SndBufferSize, pSndBuffer, RcvBufferSize, pRcvBuffer, pBytesReceived, Timeout);

 

 

Incremental input LEDs

 

The LEDs on the incremental input have the following meanings:

 

Power supply

 

The incremental encoders are powered by a common 5V supply. This is designed to ensure that sufficient power reserves remain when using most incremental encoders. Please refer to the data sheet for details of the power supply requirements.

The power supply is protected against overload and short circuits on a per-channel basis. If an overload occurs, the power supply to the affected input channel is immediately switched off and this is reported as an error. As soon as the short circuit has been rectified, the power supply is automatically reactivated.

A fault in the power supply can be identified as follows:

oThe ‘F24’ event is triggered and on the 7-segment display, the event message ‘F24’ appears.

oThe corresponding bit in the hardware status of the affected measurement channel is set. This can be read out by the measurement computer software.

 

Measurement

 

The incremental encoder inputs are sampled synchronously internally. It makes no difference whether an incremental encoder is configured for 1Vpp or for TTL / RS422.

 

Fault monitoring

 

Inputs configured for the 1Vpp incremental encoder type feature channel-by-channel error monitoring of the input signals. If everything is OK, the incremental encoder LED lights up blue continuously; otherwise, it flashes. In addition, errors can be detected in the following ways:

oThe corresponding bits in the hardware status of the affected measurement channel are set. These can be read out by the measurement computer software.

oThe ‘F25’ event is triggered. Its display on the 7-segment display is disabled by default. However, the event is logged in the diagnostic memory.

In the event of an incremental encoder fault, a position value is still output. This may be valid, but not necessarily so. To ensure reliable operation of the measurement system, the measurement computer software must therefore always query and evaluate the hardware status and respond in accordance with the application’s requirements!

 

Connector pinout

➔Connector type DSUB 15-pin, female

 

To achieve protection class IP65, suitable D-sub housings are required for the connector.