modport:md-hadin4:index
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modport:md-hadin4:index [2023/04/27 09:59] COMFILE Technology |
modport:md-hadin4:index [2023/05/31 04:34] (current) COMFILE Technology [4-Channel High Resolution Analog to Digital Input Module: MD-HADIN4] |
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| - | ====== AD Input Module: MD-HADIN4 ====== | + | ====== 4-Channel High Resolution Analog to Digital Input Module: MD-HADIN4 ====== |
| - | {{ :modport:md-hadin4:md-adin4.png }} | + | {{ :modport:md-hadin4:md-adin4.png?600 }} |
| + | |||
| + | |||
| + | ===== Specification ===== | ||
| + | ^ Item ^ Description ^ | ||
| + | | Channels | 4 | | ||
| + | | Operating Temperature | -10 ~ 50 (no condensation) | | ||
| + | | Operating Humidity | 35 ~ 85%RH | | ||
| + | | Input Resistance | 20K ohms | | ||
| + | | Input Voltage Range | 1~5V mode: 0.5 ~ 5.5V (Single-ended) \\ 0~10V mode: -0.5 ~ 10.5V (Single-ended) | | ||
| + | | Output Value | 0 ~ 100,000 | | ||
| + | | Resolution | 16.6-bit | | ||
| + | | Precision | ±0.1% | | ||
| + | | Conversion Speed | 240ms per channel | | ||
| + | | Communication Method | RS485 | | ||
| + | | Packet Transmission | 3ms | | ||
| + | | Isolation Method | No Isolation | | ||
| + | |||
| + | **Important**: The AD Input Modules' inputs are not isolated, so please be sure to not provide voltage or current in excess of the specified ranges. Doing so could cause permanent damage. | ||
| + | |||
| + | The MD-HADIN4's sampling frequency is 240ms per channel, so sampling all 4 channels will take | ||
| + | approximately 960ms. Therefore, it is unnecessary read more than once every 960ms, as it too will always | ||
| + | return the same value. | ||
| + | |||
| + | When the system is first powered on, all four channels are scanned once. Reading at this time will return an | ||
| + | invalid value. Please allow at least 960ms from the time the system is powered on before reading and data. | ||
| + | |||
| + | The MD-HADIN4 has the benefit of a higher resolution than the MD-ADIN4, but takes longer to do the conversion. Therefore, the MD-HADIN4 may not be suitable for high frequency signals. | ||
| + | |||
| + | ===== Output Values ===== | ||
| + | |||
| + | Read two 16-bit words from the MD-HADIN’s starting address to obtain the full 32-bit value. The data will be returned most significant word first. | ||
| + | |||
| + | The value returned from the MD-HADIN can be interpreted with the following algorithm: | ||
| + | |||
| + | <code C> | ||
| + | unsigned int rawData = 0; // Raw 32-bit value from the MD-HADIN | ||
| + | long value = rawData; | ||
| + | |||
| + | if ((rawData & 0x80000000) != 0) // If most significant bit is set | ||
| + | { | ||
| + | value = (rawData - 0x80000000) * -1; | ||
| + | } | ||
| + | |||
| + | if (value == -111111) | ||
| + | { | ||
| + | // Value is below the lower bound (e.g. below 1V when 1-5V mode is selected). | ||
| + | } | ||
| + | else if (value == 222222) | ||
| + | { | ||
| + | // Value is above the upper bound. (e.g. above 5V when 1-5V mode is selected). | ||
| + | } | ||
| + | else | ||
| + | { | ||
| + | // Value is between 0 and 100,000 | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | ===== Modbus Starting Address ===== | ||
| + | |||
| + | Each module has 4 channels, each with its own unique Modbus address. | ||
| + | |||
| + | ^Channel ^0 ^1 ^2 ^3 ^ | ||
| + | |Starting Address(base 10) | 200 | 201 | 202 | 203 | | ||
| + | |Starting Address(base 16) | C8 | C9 | CA | CB | | ||
| + | |Address (base 10) used by HMI (SCADA) | 40201 | 40202 | 40203 | 40204 | | ||
| + | |||
| + | ===== Module ID (Modbus Slave Address) Assignment ===== | ||
| + | |||
| + | On the front of the module, there is a rotary switch labeled //ID//, that is used to select the Modbus slave address for the module. When installing multiple modules of the same type, the ID for each module should be unique. | ||
| + | |||
| + | Rotary switch position 0 corresponds to Modbus slave address 10. If the ID is changed after the module is powered on, it must be power cycled for the new ID to take effect. | ||
| + | |||
| + | [[modport:index|MODPORT]] | ||
modport/md-hadin4/index.1682557153.txt.gz · Last modified: 2023/04/27 09:59 by COMFILE Technology