NATIONAL CONTROL DEVICES Scratchpad Memory Quick Start Guide

Transcription

1 NATIONAL CONTROL DEVICES Scratchpad Memory Quick Start Guide Store and Retrieve Non-Volatile Memory

2 N A T I O N A L C O N T R O L D E V I C E S Scratchpad Memory Store and Retrieve Non-Volatile Memory National Control Devices, LLC PO Box 455 Osceola, MO Phone Fax (866) Copyright 2013 All Rights Reserved. Notice: Portions of this manual require internet access.

3 Table of Contents Introduction... 1 Technical Support... Error! Bookmark not defined. Contact Information... Error! Bookmark not defined. Notice:... Error! Bookmark not defined.

4 Introduction S cratchpad Memory allows you to store and retrieve up to 8 bytes of data in a non-volatile EEPROM memory within the NCD device. Scratchpad Memory may be used for anything. The memory contents have no effect of the controller. You can use scratchpad memory to store important variables or use this memory to test for the existence of a particular controller. NCD Base Station Software Use NCD Base Station Software to store and retrieve non-volatile EEPROM memory within your device. After connecting your device to the computer, run Base Station software. Choose the COM or IP address of your favorite interface technology and click OK. Select Scratchpad Memory Command Set from the dialog box as shown below. NOTE: Scratchpad Memory is not a feature of all NCD devices. Scratchpad Memory will only be shown if your controller supports the Scratchpad memory command set. 1

5 Device Memory Features: A. Numeric Byte Values from 0 to 255 may be stored in each green box below. B. Reads Scratchpad memory from the controller. C. Communication details. This section is shown when MORE option is selected in section F of diagram. D. Use this button to put the device in Configuration Mode BEFORE Storing Data in memory. Device must be in configuration mode before storing your parameters. E. Use this button to store data in non-volatile memory while the device is in configuration mode. The controller may be powered down for extended periods of time, you byte values will retain in memory. Storing in excess of 100,000 times will damage the EEPROM memory. Memory storage should be periodic for longest possible life. F. MORE or LESS. MORE option expands the window to include section C in diagram. LESS option shrinks the window to exclude section C. 2

6 Configuration Mode: You receive the dialog box shown below when clicking button C on previous page. A. Displays the current operating mode of the controller. Device must be in Configuration Mode for proper storage. Device may be in Configuration or Run Mode during a EEPROM memory read function. B. Click this button to put the controller in Configuration Mode prior to storing data in EEPROM memory. C. Communications Details. Shown when the MORE option is section D in the diagram is selected. D. MORE or LESS. MORE option expands the window to include Section C of diagram. LESS option shrinks the window to exclude section C. E. Click this button to return the controller to Run Mode. D A B C E 3

7 Scratchpad Memory allows you to store and retrieve up to 8 bytes of data in a non-volatile EEPROM memory within the NCD device. Scratchpad Memory may be used for anything. The memory contents have no effect on the controller. You can use scratchpad memory to store important variable or use this memory to test for the existence of a particular controller. Storing data in EEPROM Memory requires the device to be in configuration mode. However, this may be changed if you disable EEPROM Write protection using Device Configuration. Go to Device Configuration, EEPROM Write Protection, and use the pull down menu to select the first or second option in the list. This will allow EEPROM to be stored in RUN mode. Please note, write commands will appear to work properly even if the device is write protected; however, data will not actually be stored. Read a Single Byte from EEPROM This command reads a single data byte from non-volatile EEPROM Memory and reports the contents as a value from 0 to 255. Send Bytes: Byte 1: Byte 2: Byte 3: Function: Command Location Decimal Values: Hex Values: 0xFE 0x33 0x01-0x08 Receive Byte: Decimal: Hex: 0x00-0xFF NCD Component Library Command Method: Not Yet Implemented Write a Single Byte in EEPROM This command stores a single byte of data in non-volatile EEPROM Memory. This command requires two parameters. The first parameter is the memory location, and has a valid range of 1 to 8. The second parameter contains the data byte to be stored in memory, and has a valid range of Do NOT Exceed 100,000 Write operations or the EEPROM memory will be damaged. Send Bytes: Byte 1: Byte 2: Byte 3: Byte 4: Function: Command Location Data Decimal Values: Hex Values: 0xFE 0x33 0x01-0x08 0x00-0xFF Receive Byte: Decimal: 85 Hex: 0x55 NCD Component Library Command Method: Not Yet Implemented 4

8 Technical Support T echnical support is available through our website, controlanything.com. Support is the way we connect NCD engineers to our customers. Click on the Support tab at the top of any page on our website to be taken to the Forum page. Here you can publicly post or review problems that customers have had, and learn about our recommended solutions. Our engineers monitor questions and respond continually throughout the day. Before requesting telephone technical support, we ask that customers please try to resolve their problems through Support first. However, for persistent problems, NCD technical support engineers will schedule a phone consultation. 5

9 Contact Information National Control Devices, LLC PO Box 455 Osceola, MO phone fax Open 9 a.m. - 4 p.m. CST Like National Control Devices on Facebook, and follow us on All orders must be placed online at our website, Notice: The only authorized resellers of NCD products are All other websites are not authorized dealers; we have noticed some retailers offering our products fraudulently. Copyright 2013 National Control Devices All Rights Reserved. 6