Differences

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--- en-us_commands:reference:ianalogread2 [2026/09/07 23:35] – 바깥 편집 127.0.0.1
+++ en-us_commands:reference:ianalogread2 [2026/09/14 20:30] (current) – external edit 127.0.0.1
@@ Line 14: / Line 14: @@
 ===== Example =====
+This example scales the MPINO-8A4R(T)-S 4–20mA input ''A2'' to 0–100%.
 <code cpp>
 void setup() {
-  analogReference(EXTERNAL);  // If required by the MPINO product
   Serial.begin(115200);
 }
 void loop() {
-  int32_t percent = IanalogRead2(A2, 0, 100);  // Map the 4–20mA input value to the specified integer range.
+  const int32_t percent = IanalogRead2(A2, 0, 100);  // Scale the A2 4–20mA input to an integer percentage.
   if (percent == ANALOG_READ2_ERROR) {
-    Serial.println("4-20mA wire break or input error");
+    Serial.println(F("4-20mA input error"));
   } else {
+    Serial.print(F("A2: "));
     Serial.println(percent);
   }
   delay(500);
 }
@@ Line 36: / Line 36: @@
 ===== Precautions =====
-  * Set the module DIP switches and wiring for 0~20mA current I/O.
+  * In this example, ''A2'' is a current input on MPINO-8A4R(T)-S. For another product, check its pin map for supported 4–20mA channels and wiring.
   * An input of approximately 3.6~4.0mA returns the normal value ''0''; inputs below 3.6mA return an error value.
   * Error values help detect open circuits. The user must implement final alarms and safety actions in the program.
@@ Line 48: / Line 48: @@
   * The analog output circuit requires an external 12~24V supply. USB power alone may not provide normal output.
   * Verify actual current input/output with measuring instruments after preparing a test product.
+===== Built-in Commands in the Same Category =====
+  * [[:en-us_commands:reference:ianalogread2f|IanalogRead2f() View detailed description]]
 [[:en-us_commands:builtin|← Built-in Command List]]