Integrating SISGEO Digitized MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21

Size: px

Start display at page:

Download "Integrating SISGEO Digitized MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21"

Pamela Pierce
5 years ago
Views:

5 Gould Road, PO Box 2155 New London, NH 03257 Voice: (603) 526-9800 info@canarysystems.

1 5 Gould Road, PO Box 2155 New London, NH Voice: (603) Integrating SISGEO Digitized MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Overview This application note will provide all the necessary hardware and software integration information to use a CR800 or CR1000 datalogger to read chains of SISGEO Digitized MEMS In-Place Inclinometers (IPIs). The inclinometers use RS-485 serial communication and as such they can be chained together and connected to a single RS-232 to RS-485 converter. The converter is connected to one of the COM ports on the CR800 or CR1000 datalogger. Each sensor must have a unique RS-485 address which is configured at the factory by SISGEO. This configuration allows a single datalogger to take readings from multiple sensors in the IPI. Connections The sensors are connected to the RS-485 side of the RS-485/RS232 converter according to the instructions provided by SISGEO (DCE, half duplex without echo). This programming will control the 12 Vdc output on the datalogger. At the start of each scan, the 12 Vdc output is turned on and then turned off after reading from all the sensors in the chain. Also, if you are using the SISGEO communications window feature, use this output to power the sensors. Or use this output to control another power source, 24 Vdc power source via a relay for example. Connect the RS-232 to the CR800 or CR1000 datalogger according to the table below: CR800/CR1000 Connections RS-232 DE9 Description CR800/CR1000 COM1 CR800/CR1000 COM2 CR1000 COM3 3 Transmit Data C1 C3 C5 C7 2 Receive Data C2 C4 C6 C8 5 Ground G G G G CR1000 RS-232 Port Connection CR1000 COM4 Use a standard RS-232 NULL modem cable. Both the datalogger and the RS-232/RS485 converter are RS-232 DCE devices. This means that transmit and receive are on the same pins on the DE9 connector on each. Therefore, this requires the NULL modem cable, which crosses the transmit and receive lines, (rather than a straight through serial cable) to correctly connect transmit on one device to receive on the other and vice versa. MultiLogger Configuration There are 3 configurations steps for using the Sisgeo sensors with MultiLogger: 1.) Configure the Input Locations to store the sensor and temperature data 2.) Configure Direct Connect Channel(s) 3.) Configure the Instruction File to specify the number of sensors in your chain, the RS-485 address of each sensor, and the warm up and address delay times. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 1 of 10

Configure Input Locations Use the Input Locations form to define the locations required by the sensor programming, this form is accessible from the Program tab in Logger or the Program dropdown menu.

2 Configure Input Locations Use the Input Locations form to define the locations required by the sensor programming, this form is accessible from the Program tab in Logger or the Program dropdown menu. You will use this form to add variable arrays for X-axis, Y-axis, and Temperature. To create an array, scroll to the bottom of the location list and select the last number in the list, should be 47. Place the cursor in the Label edit and enter the variable array name to correspond to which port the MEMS IPIs chains are connected and how many sensors are in the MEMS IPI chains, as follows, where n = number of sensors; RS232 = IPI_X(n) COM1 = IPI1_X(n) COM2 = IPI2_X(n) COM3 = IPI3_X(n) COM4 = IPI4_X(n) The example shown describes a MEMS IPI chain connected to COM1 with 4 sensors. Click or move your cursor to another edit box on the form, and array of locations will be inserted in the location list (in this example 4 locations will be added). Selected each location number in the location list (e.g. 47, 48, 49, and 50) and check the Store Location check box on each. Scroll to bottom of the location list and select the last number (51 in this example of 4 sensors) and repeat for the Y-Axis variable array using the same format as for the X, except replace the X with Y, example shown at right matches the X locations. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 2 of 10

3 Select each location number for the Y-Axis array (e.g. 51, 52, 53 and 54) and check Store Location. Note: Only check Store Location for the Y locations if the IPI is a biaxial version. Scroll to the bottom of the location list and select the last number (55 is this example of 4 sensors) and repeat for the Temperature variable array replacing X or Y with Temp, example shown at right to match our previous X and Y locations. Select each location number for the temperature array (e.g. 55, 56, 57, and 58) and check Store Location. When you are finished, click the Accept button to exit the form and return to the Logger form. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 3 of 10

4 Configure Direct Connect Channel(s) Use the Configure Direct Connect Channels form to select the SISGEO sensor and the port on the datalogger; this form is accessible from the Program tab in Logger. Gage Type: Digital Make: SISGEO Model: MEMS IPI port (where; port is the physical port you are using) If you have another MEMS IPI chain connected to a different port then use subsequent channels to configure them. The channel is used to store communications errors, the Label can be configured as well. Configure the Instruction File After selecting the Gage Type, Make, and Model, click on the gear button to open the Instruction File for editing. In the Instruction File you need to specify the number of sensors in your chain, the RS-485 address of each sensor and the warm up delay and address delay time in seconds for the sensors. The sensors should have been configured at the factory by SISGEO. The warm up delay and address delay parameters must be the same for all the sensors in the chain. The example shows RS- 485 addresses of 1, 3, 4 and 6. You must specify the address in ascending order for the programming to function correctly, e.g. entering 6, 1, 3, 4 is invalid. If you only have a single sensor, then remove the comma in the list of addresses, e.g. {1}. If you do not wish to use the SISGEO communications window feature for energy saving enter a value of 0 for both the warm up delay and address delay (this assumes the sensors are configured that way). After you are finished, click on the Save button and close the editor. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 4 of 10

Troubleshooting Problem: When you click on the Start/Update button you get a dialog box that indicates the compile failed.

shown at right. Note the errors are related to the sensor configuration variables, e.g. NumberOfSensors, WarmUpDelay, AddressDelay, or rs485addresses.

Verify that you have entered the required information and the syntax is correct.

If you forgot or incorrectly configured the Input Locations you will see a dialog like the one at right.

arrays in the Configure Input Locations form.

Note: You must specify a variable for the Y- Axis (IPIn_Y) even if you are only using single axis sensors.

5 Troubleshooting Problem: When you click on the Start/Update button you get a dialog box that indicates the compile failed. If you forgot or incorrectly edited the Instruction File with sensor configuration you will see a dialog something like the one shown at right. Note the errors are related to the sensor configuration variables, e.g. NumberOfSensors, WarmUpDelay, AddressDelay, or rs485addresses. Go back to Direct Connect Channel Configuration and click on the gear button to open the instruction file editor. Verify that you have entered the required information and the syntax is correct. Refer to the lines above in the comment section for the proper syntax for each line. If you forgot or incorrectly configured the Input Locations you will see a dialog like the one at right. If you get any errors related to an undeclared variable, IPIn_X, IPIn_Y, or IPIn_Temp, you have not correctly created variable arrays in the Configure Input Locations form. The spelling of the variable names must match exactly as specified in this application note. Note: You must specify a variable for the Y- Axis (IPIn_Y) even if you are only using single axis sensors. You can uncheck the Store Location check box so that the Y-Axis data doesn t get stored in the data table, but the programming still requires the variable array. When you create the variable arrays the parentheses and the number is the syntax that creates an array of variables, as opposed to a single variable. If you forgot the parentheses and number you will see a dialog box like the one shown at right. In this example, IPI1_Temp was entered incorrectly for the Temp array, rather than the correct syntax of IPI1_Temp(4). Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 5 of 10

6 Configuring for multiple MEMS IPI chains Multilogger can be configured to support multiple MEMS IPI chains. All sensors must have a unique RS- 485 address across all chains. This configuration method will allow you to provide unique names for each chain. In this example, it is shown two MEMS IPI chains, one with 3 sensors and one with 2 sensors. Follow the instructions above to configure Multilogger for total of five sensors, and specify the RS-485 address for each. Use the Input Locations form to define variable arrays for X Axis, Y Axis, and Temperature (IPI_X(5), IPI_Y(5), IPI_Temp(5) if we are using the RS232 port on the datalogger). Note: these arrays cover all of the sensors in both MEMS IPI chains. Refer to the instructions and screen shots above. After you have created the three variable arrays, you need to create an alias for each array element. The alias name will be used to log the data and display in the text monitor. Select the first element of the first array in the Location list. Most likely this will be number #48. In the Alias edit box type the name you wish. This example uses the names Chain1 and Chain2 to signify the two chains. Chain1 has three sensors and Chain2 has two sensors, so will need to create aliases for the elements as follows: IPI_X(1) IPI_X(2) IPI_X(3) IPI_X(4) IPI_X(5) IPI_Y(1) IPI_Y(2) IPI_Y(3) IPI_Y(4) IPI_Y(5) -> Chain1_Sensor1_X -> Chain1_Sensor2_X -> Chain1_Sensor3_X -> Chain2_Sensor1_X -> Chain2_Sesnor2_X -> Chain1_Sensor1_Y -> Chain1_Sensor2_Y -> Chain1_Sensor3_Y -> Chain2_Sensor1_Y -> Chain2_Sensor2_Y Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 6 of 10

7 IPI_Temp(1) -> Chain1_Sensor1_Temp IPI_Temp(2) -> Chain1_Sensor2_Temp IPI_Temp(3) -> Chain1_Sensor3_Temp IPI_Temp(4) -> Chain2_Sensor1_Temp IPI_Temp(5) -> Chain2_Sensor2_Temp If you have entered all of the alias names correctly, the Text Monitor window will look like this Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 7 of 10

8 Each alias name must be unique, if you use the same name twice you will get an error message when you attempt to update the datalogger. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 8 of 10

9 Notes concerning the SISGEO Communication Window Feature The sensors have a built in feature called the SISGEO Communication Window feature. This is used to conserve power. The feature uses the warm up delay and address delay parameters stored in the sensor s non-volatile memory to keep the sensor in a low power state while reading from other sensors in the chain. These parameters must be set in the instruction file as noted above. The instruction file will use these values to command the datalogger to wait the appropriate amount time before attempting to read from a particular sensor in the chain. The instruction file is setup to use the datalogger s switched 12 Vdc output. Assuming the sensors are powered from this output (or through a relay control by it) the datalogger turns on and turns off the sensors between scans. The datalogger will turn on the 12 Vdc output at the start of the scan; each sensor will stay in its lower power state according to the warm up and address delay times. Once a sensor is awake it will be in its maximum power consumption state. The sensors have a command to enter Stop Mode to return to a low power state. The instruction file will send the Switch Off command to put the each sensor into Stop Mode just after reading its values. Once a sensor is in Stop Mode, the only way to wake it up again is to remove its external power and restore it. Therefore Stop Mode combined with switching off the 12 Vdc output allows for the maximum power conservation. If you do not wish to use the communication window feature and your sensors have a value of zero for both the warm up delay and the address delay (set at the factory), enter zero for these values in the instruction file as noted above. In addition if your sensors are not connected to the 12 volt switched power output from the datalogger (or a power supply controlled by it) you must remove the line of code in the instruction file that sends the Switch Off /Stop Mode command. You can do this by either deleting the line or placing a comment character in front of the line. This apostrophe is the comment character. Placed here, it prevents this line of code from running and therefore does not put the sensor in Stop Mode Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 9 of 10

10 If you do not comment out this line of code, the datalogger will read the sensor correctly for the first scan. After that, it will be in Stop Mode and you will see values of 9999 returned for X and Y axis and for the temperature. Integrating Sisgeo MEMs IPI s with the CR800 or CR1000 Sensor Application Note #21 Page 10 of 10

Integrating the MDT SMART Link-485 Sensor Application Note #32

5 Gould Road, PO Box 2155 New London, NH 03257 USA Voice: (603) 526-9800 info@canarysystems.com www.canarysystems.com Integrating the MDT SMART Link-485 Sensor Application Note #32 Overview MDT s SMART