CM3 RTD Module Functions

CM3-SP04ERO Functions

RTD Conversion Enable/Disable

1. For each channel, users can set RTD conversion to be enabled or disabled.
2. For unused channels, users can make the conversion time short by setting them to disabled.

Temperature Detection Value

1. The temperature detection value saves a converted Celsius and Fahrenheit value into memory.
   • This is down to the first decimal point × 10.
2. The temperature detection value converts the temperature into a digital value:
   • 0 ~ 16,000
   • -192, ~ 16,191
   • -8,000 ~ 8,000
   • -8,192 ~ 8,192

Information for Operation Channels

1. Information for channels under normal temperature conversion is displayed for each channel.
2. If there is any disconnection error in the RTD conversion-enabled channel, the bit becomes 0.
3. The bit for a disabled channel is 0.

Disconnection Detection Function

1. There is a function to detect the disconnection of thermocouple and cable for each channel.
2. If a disconnection is detected, the RTD module holds the temperature value before disconnection without further conversion.
   • In this case, the error code is displayed while the module LED flickers every 0.3 seconds.

Digital Output Setting

1. Users can select the following value ranges for saving digital output values to buffer memory:
   • 0 ~ 16,000
   • -192 ~ 16,191
   • -8,000 ~ 8,000
   • -8,192 ~ 8,191

Minimum and Maximum Temperature Setting

1. The minimum and maximum temperature value can be set by the user.
   • The RTD module converts the following temperature values into digital values:
     • -200°C ~ 600°C (-328°F ~ 1,112°F) → 0 ~ 16,000 (-8,000 ~ 8,000)
     • -50°C ~ 160°C (-58°F ~ 320°F) → 0 ~ 16,000 (-8,000 ~ 8,000)
2. If a user inputs a minimum or maximum value, the RTD module converts the minimum value into 0 (-8,000) and the maximum value into 16,000 (8,000).