{"id":1538,"date":"2025-04-11T08:58:46","date_gmt":"2025-04-11T08:58:46","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&p=1538"},"modified":"2025-06-10T06:43:20","modified_gmt":"2025-06-10T06:43:20","slug":"ms120-cpu-device","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/","title":{"rendered":"MS120: CPU device"},"content":{"rendered":"\n

The MS120 with late Firmware<\/a> revisions can respond to UV instructions that address the CPU device<\/a>. Some of the responses are dependent on the hardware configuration.<\/p>\n\n\n\n

Board Type<\/h6>\n\n\n\n

The board will respond to the following board-type poll:<\/p>\n\n\n\n

  SPxPoll2      3,!CPU<\/a><\/pre>\n\n\n\n
by placing its board type identification number on U0 and U1. The response is a function of the type (model) of board and the number of connected XPice expansion boards (e.g. XBIO16<\/a>, XIRO16<\/a>, HIO16<\/a>). The numbers can be fetched from U0 and U1 by the PushU<\/a><\/code> instruction.<\/p>\n\n\n\n
The following table defines the responses for the MS120 and its predecessor MS12 with varying amounts of expansion:<\/p>\n\n\n\n
Configuration<\/td>U0<\/td>MS120<\/td>MS12<\/td><\/tr>
Controller<\/a> alone<\/td>0<\/td>91<\/td>48<\/td><\/tr>
Controller+16XPice<\/td>0<\/td>92<\/td>49<\/td><\/tr>
Controller+32XPice<\/td>0<\/td>93<\/td>50<\/td><\/tr>
Controller+48XPice<\/td>0<\/td>94<\/td>51<\/td><\/tr>
Controller+64XPice<\/td>0<\/td>95<\/td>52<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Note that you can discover in this way how much expansion has been added but not the type of expansion board.<\/p>\n\n\n\n
Interpreting the number of XPice points can be a little tricky. For boards with segregated inputs and outputs, like XIRO16 and HIO16, each 8I\/8O board corresponds to 16 XPice points. For the XBIO16, each bidirectional point corresponds to one input and one output (and appears as such on the SPLat\/PC screen). That means one XBIO16 board gets counted as 32 XPice points although it only adds 16 I\/O points to your configuration.<\/p>\n\n\n\n
PWM base frequency (Dialect<\/a> 20 or later)<\/h6>\n\n\n\n
The analog outputs on the board are generated by a pulse width modulated digital pulse train which is filtered (averaged) by an analog filter to produce a DC output. Normally the frequency of the PWM pulse train is 16kHz. The base frequency can however be altered using the instruction:<\/p>\n\n\n\n
SPxCmd1          0,!CPU<\/pre>\n\n\n\n
with register U0 preset to a value between 0 and 7. The resulting PWM frequencies are given in the following table:<\/p>\n\n\n\n
U0<\/th>PWM frequency<\/th><\/tr>
0<\/td>16kHz (Default)<\/td><\/tr>
1<\/td>8kHz<\/td><\/tr>
2<\/td>4kHz<\/td><\/tr>
3<\/td>2kHz<\/td><\/tr>
4<\/td>1kHz<\/td><\/tr>
5<\/td>500Hz<\/td><\/tr>
6<\/td>250Hz<\/td><\/tr>
7<\/td>125Hz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Any other value will result in a fatal runtime error.<\/p>\n\n\n\n
All analog output pins are affected. This feature is designed to be used with PWM output circuits such as DC motor speed controls. Be aware that a low PWM frequency will have an impact on any actual analog (filtered DC) outputs. Our filter circuits are normally designed for the default PWM frequency. Using a much lower frequency will produce ripple in the DC output.<\/p>\n\n\n\n
When used with an AnOut<\/a><\/code> instruction, the resolution is 8 bits. With fAnOut<\/a><\/code> it is 10 bits.<\/p>\n\n\n\n
Modify SuperTimer 10mS clock interval (Dialect 20 or later)<\/h6>\n\n\n\n
You can change the basic 10mS SuperTimer clock interval to some other value. Set U0 to the required value in mS and then execute a<\/p>\n\n\n\n
         SPxCmd1         1,!CPU<\/pre>\n\n\n\n
This affects all timers that use the SuperTimer mechanism, which is any timer that can have a duration counter up to 16,777,215 (Pause<\/a><\/code>, fSTTimeSince<\/a><\/code>, WaitOnT<\/a><\/code>, etc). If you set the interval to 1, the timing will run 10 times faster than normal. If you set it to 256, the timing will run 25.6 times slower<\/em> than normal giving you a timing range of 49.7 days. Due to the resolution of the internal math, the re-scaling will produce an error of up to 0.2% at the slow end of the scale. The actual error will be the error produced by rounding 65,536\/U0 to the nearest integer. If U0=0 it reverts to the default 10mS.<\/p>\n\n\n\n
Note that it makes little sense to run the SuperTimers with a clock that is faster than the “loop time” of your program.<\/p>\n\n\n\n
LCD backlight dimming control<\/h6>\n\n\n\n
The following applies only to MS120 boards fitted with V3.20 or later firmware.<\/p>\n\n\n\n
The following is old, and included for reference, or very special circumstances. The OBLCD_Dim<\/a><\/code> instruction provides an easier way of controlling dimming.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
The board\/Firmware supports a timer that automatically dims the backlight after a set time interval with no user activity, as determined by presses of the front panel push buttons.<\/p>\n\n\n\n
The code:<\/p>\n\n\n\n
                SetU       0,BL_HighLevel    \n                SetU       1,BL_LowLevel\n                SPxCmd2    1,!CPU  <\/pre>\n\n\n\n
will set the maximum, undimmed (BL_HighLevel<\/code>) and minimum, dimmed (BL_LowLevel<\/code>) brightness levels of the backlight. The two levels must be in the range 0 (minimum) to 8 (maximum). Any other values will produce an error.<\/p>\n\n\n\n
The code:<\/p>\n\n\n\n
                SetU       0,BL_DimTime\n                SPxCmd1    4,!CPU<\/pre>\n\n\n\n
Will set the auto-dim timer value to BL_DimTime<\/code> minutes. The allowable range is 0 to 255 (4h15m). Using 0 dims the backlight instantly.<\/p>\n\n\n\n
Example: LCD backlight auto-off timer<\/a>.<\/p>\n\n\n\n
In MS121 firmware 4.14 or later, the state of the backlight can be read back. The code<\/p>\n\n\n\n
    SPxPoll1    8,!cpu        ;returns current back light level in U(0)<\/pre>\n\n\n\n
Use the PushU<\/a> 0<\/a><\/code> instruction to get the number to X<\/a> or use GoIfUT<\/a>\/GoifUF<\/a><\/code> if you just want to know when the back light is on\/off.<\/p>\n\n\n\n
If you are using output 20 to control the back light, this CPU call will still work but return a value of either 8 for back light on or 0 for back light off.<\/p>\n\n\n\n
CPU temperature readout (Dialect 21 through 27 (Deleted after 27))<\/h6>\n\n\n\n
An SPxPoll4 0,!CPU<\/code> returns the floating point temperature of the CPU chip in \u00b0C at locations U(0) –> U(3)<\/p>\n\n\n\n
An SPxPoll4 1,!CPU<\/code> returns the floating point temperature of the CPU chip in \u00b0F at locations U(0) –> U(3)<\/p>\n","protected":false},"excerpt":{"rendered":"
The MS120 with late Firmware revisions can respond to UV instructions that address the CPU device. Some of the responses are dependent on the hardware configuration. Board Type…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1503,"menu_order":9,"template":"","class_list":["post-1538","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"\nMS120: CPU device - 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=\"MS120: CPU device - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"The MS120 with late Firmware revisions can respond to UV instructions that address the CPU device. Some of the responses are dependent on the hardware configuration. Board Type...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/\" \/>\n<meta property=\"og:site_name\" content=\"SPLat Controls\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-10T06:43:20+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=\"4 minutes\" \/>\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\/ms120-product-documentation\/ms120-cpu-device\/\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/\",\"name\":\"MS120: CPU device - SPLat Controls\",\"isPartOf\":{\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#website\"},\"datePublished\":\"2025-04-11T08:58:46+00:00\",\"dateModified\":\"2025-06-10T06:43:20+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Product documentation\",\"item\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Product documentation: Controllers\",\"item\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"MS120 product documentation\",\"item\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/\"},{\"@type\":\"ListItem\",\"position\":5,\"name\":\"MS120: CPU device\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#website\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/\",\"name\":\"SPLat Controls\",\"description\":\"OEM Embedded Machine Controllers\",\"publisher\":{\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#organization\",\"name\":\"SPLat Controls\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2024\/10\/logo.svg\",\"contentUrl\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2024\/10\/logo.svg\",\"caption\":\"SPLat Controls\"},\"image\":{\"@id\":\"https:\/\/webprojects.cloud\/wordpress\/splatco\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"MS120: CPU device - SPLat Controls","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"MS120: CPU device - SPLat Controls","og_description":"The MS120 with late Firmware revisions can respond to UV instructions that address the CPU device. Some of the responses are dependent on the hardware configuration. Board Type...","og_url":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/","og_site_name":"SPLat Controls","article_modified_time":"2025-06-10T06:43:20+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/","url":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/","name":"MS120: CPU device - SPLat Controls","isPartOf":{"@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#website"},"datePublished":"2025-04-11T08:58:46+00:00","dateModified":"2025-06-10T06:43:20+00:00","breadcrumb":{"@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/ms120-cpu-device\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/webprojects.cloud\/wordpress\/splatco\/"},{"@type":"ListItem","position":2,"name":"Product documentation","item":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/"},{"@type":"ListItem","position":3,"name":"Product documentation: Controllers","item":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/"},{"@type":"ListItem","position":4,"name":"MS120 product documentation","item":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/ms120-product-documentation\/"},{"@type":"ListItem","position":5,"name":"MS120: CPU device"}]},{"@type":"WebSite","@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#website","url":"https:\/\/webprojects.cloud\/wordpress\/splatco\/","name":"SPLat Controls","description":"OEM Embedded Machine Controllers","publisher":{"@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#organization","name":"SPLat Controls","url":"https:\/\/webprojects.cloud\/wordpress\/splatco\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#\/schema\/logo\/image\/","url":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2024\/10\/logo.svg","contentUrl":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-content\/uploads\/2024\/10\/logo.svg","caption":"SPLat Controls"},"image":{"@id":"https:\/\/webprojects.cloud\/wordpress\/splatco\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/spl_knowledgebase\/1538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/spl_knowledgebase"}],"about":[{"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/types\/spl_knowledgebase"}],"author":[{"embeddable":true,"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/users\/1"}],"up":[{"embeddable":true,"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/spl_knowledgebase\/1503"}],"wp:attachment":[{"href":"https:\/\/webprojects.cloud\/wordpress\/splatco\/wp-json\/wp\/v2\/media?parent=1538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}