{"id":1393,"date":"2025-04-10T11:48:48","date_gmt":"2025-04-10T11:48:48","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&p=1393"},"modified":"2025-04-28T08:16:02","modified_gmt":"2025-04-28T08:16:02","slug":"hmi430-700-nvem0-read-only","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hmi430-700-product-documentation\/hmi430-700-non-volatile-memory\/hmi430-700-nvem0-read-only\/","title":{"rendered":"HMI430\/700: NVEM0 (Read Only)"},"content":{"rendered":"\n

NVEM Page 0 is the same as all other SPLat controllers, but in the HMI430\/700 it is read only so can’t be written to by your application at runtime.  You can only write data to NVEM0 in the HMI430\/700 by putting data into NVEM0 in your source code then compile and download to the HMI430 with SPLat\/PC.  Once your application is running it is unable to change data within NVEM0, it can only read from it.<\/p>\n\n\n\n

Therefore, if you try to call write instruction on this page, like\u00a0NVWriteRec<\/a>\u00a0or\u00a0NVfWriteW<\/a>\u00a0the HMI430 will reset.<\/p>\n\n\n\n

Here’s an example of displaying the day of week from a table in NVEM0:<\/p>\n\n\n\n

<somwhere in your code>
   RTCReadDate      ;get the date from the RTC
   RTCPushDN        ;put the day number into X
   #HMI Print( \"Day is:\", nz( pDOW, =x ) )   ;display the day
<the rest of your code>

   
   NVEM0            ;this marker tells SPLat\/PC the everything that follows is to be put into NVEM0<\/pre>\n\n\n\n
pMon   NV0Byte  \"Monday\",0
pTue   NV0Byte  \"Tuesday\",0
pWed   NV0Byte  \"Wednesday\",0
pThr   NV0Byte  \"Thursday\",0
pFri   NV0Byte  \"Friday\",0
pSat   NV0Byte  \"Saturday\",0
pSun   NV0Byte  \"Sunday\",0

pDOW
   NV0Ptr   pMon
   NV0Ptr   pTue
   NV0Ptr   pWed
   NV0Ptr   pThr
   NV0Ptr   pFri
   NV0Ptr   pSat
   NV0Ptr   pSun<\/pre>\n\n\n\n
 <\/pre>\n\n\n\n
Here is a\u00a0full list of NVEM instructions<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
NVEM Page 0 is the same as all other SPLat controllers, but in the HMI430\/700 it is read only so can’t be written to by…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1390,"menu_order":2,"template":"","class_list":["post-1393","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"\nHMI430\/700: NVEM0 (Read Only) - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HMI430\/700: NVEM0 (Read Only) - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"NVEM Page 0 is the same as all other SPLat controllers, but in the HMI430\/700 it is read only so can’t be written to by...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hmi430-700-product-documentation\/hmi430-700-non-volatile-memory\/hmi430-700-nvem0-read-only\/\" \/>\n<meta property=\"og:site_name\" content=\"SPLat Controls\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-28T08:16:02+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hmi430-700-product-documentation\/hmi430-700-non-volatile-memory\/hmi430-700-nvem0-read-only\/\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hmi430-700-product-documentation\/hmi430-700-non-volatile-memory\/hmi430-700-nvem0-read-only\/\",\"name\":\"HMI430\/700: NVEM0 (Read Only) - 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