To write to buffer memory, use the TO instruction.
To read from buffer memory, use the FROM instruction.
Please refer to the table below for writing to and reading from buffer memory.
| Memory Address (Hexadecimal) | Memory Address (Decimal) | Details | Read | Write |
|---|---|---|---|---|
| 00H | 0 | TC conversion Enable/Disable | ✓ | ✓ |
| 01H | 1 | Channel 1 Temperature detection value (°C) | ✓ | – |
| 02H | 2 | Channel 2 Temperature detection value (°C) | ✓ | – |
| 03H | 3 | Channel 3 Temperature detection value (°C) | ✓ | – |
| 04H | 4 | Channel 4 Temperature detection value (°C) | ✓ | – |
| 05H | 5 | Reserved | – | – |
| 06H | 6 | Reserved | – | – |
| 07H | 7 | Reserved | – | – |
| 08H | 8 | Reserved | – | – |
| 09H | 9 | Channel 1 ~ Channel 4 Thermocouple type setting | ✓ | ✓ |
| 0AH | 10 | Digital output setting 1 | ✓ | ✓ |
| 0BH | 11 | Channel 1 Temperature detection value (°F) | ✓ | – |
| 0CH | 12 | Channel 2 Temperature detection value (°F) | ✓ | – |
| 0DH | 13 | Channel 3 Temperature detection value (°F) | ✓ | – |
| 0EH | 14 | Channel 4 Temperature detection value (°F) | ✓ | – |
| 0FH | 15 | Reserved | – | – |
| 10H | 16 | Reserved | – | – |
| 11H | 17 | Reserved | – | – |
| 12H | 18 | Reserved | – | – |
| 13H | 19 | Information for operation channel | ✓ | – |
| 14H | 20 | Assigning type setup data | ✓ | ✓ |
| 15H | 21 | Channel 1 Digital conversion value | ✓ | – |
| 16H | 22 | Channel 2 Digital conversion value | ✓ | – |
| 17H | 23 | Channel 3 Digital conversion value | ✓ | – |
| 18H | 24 | Channel 4 Digital conversion value | ✓ | – |
| 19H | 25 | Reserved | – | – |
| 1AH | 26 | Reserved | – | – |
| 1BH | 27 | Reserved | – | – |
| 1CH | 28 | Reserved | – | – |
| 1DH | 29 | Digital output setting 2 | ✓ | ✓ |
| 1EH | 30 | Designate Average Process | ✓ | ✓ |
| 1FH | 31 | Channel 1 Error code | ✓ | – |
| 20H | 32 | Channel 2 Error code | ✓ | – |
| 21H | 33 | Channel 3 Error code | ✓ | – |
| 22H | 34 | Channel 4 Error code | ✓ | – |
| 23H | 35 | Reserved | – | – |
| 24H | 36 | Reserved | – | – |
| 25H | 37 | Reserved | – | – |
| 26H | 38 | Reserved | – | – |
| 27H | 39 | Reserved | – | – |
| 28H | 40 | Requesting data for calibration | ✓ | ✓ |
| 29H | 41 | Channel 1 Maximum temperature input value | ✓ | ✓ |
| 2AH | 42 | Channel 2 Maximum temperature input value | ✓ | ✓ |
| 2BH | 43 | Channel 3 Maximum temperature input value | ✓ | ✓ |
| 2CH | 44 | Channel 4 Maximum temperature input value | ✓ | ✓ |
| 2DH | 45 | Reserved | – | – |
| 2EH | 46 | Reserved | – | – |
| 2FH | 47 | Reserved | – | – |
| 30H | 48 | Reserved | – | – |
| 31H | 49 | Assigning temperature setting data | ✓ | ✓ |
| 32H | 50 | Assigning temperature setting data | ✓ | – |
| 33H | 51 | Channel 1 Minimum temperature input value | ✓ | ✓ |
| 34H | 52 | Channel 2 Minimum temperature input value | ✓ | ✓ |
| 35H | 53 | Channel 3 Minimum temperature input value | ✓ | ✓ |
| 36H | 54 | Channel 4 Minimum temperature input value | ✓ | ✓ |
| 37H | 55 | Reserved | – | – |
| 38H | 56 | Reserved | – | – |
| 39H | 57 | Reserved | – | – |
| 3AH | 58 | Reserved | – | – |
| 3BH | 59 | Channel 1 Average time/filter coefficient setting | ✓ | ✓ |
| 3CH | 60 | Channel 2 Average time/filter coefficient setting | ✓ | ✓ |
| 3DH | 61 | Channel 3 Average time/filter coefficient setting | ✓ | ✓ |
| 3EH | 62 | Channel 4 Average time/filter coefficient setting | ✓ | ✓ |
| 3FH | 63 | Operating System Version | ✓ | – |
| 40H | 64 | Channel 1 Maximum temperature in changing | ✓ | ✓ |
| 41H | 65 | Channel 2 Maximum temperature in changing | ✓ | ✓ |
| 42H | 66 | Channel 3 Maximum temperature in changing | ✓ | ✓ |
| 43H | 67 | Channel 4 Maximum temperature in changing | ✓ | ✓ |
| 44H | 68 | Reserved | – | – |
| 45H | 69 | Reserved | – | – |
| 46H | 70 | Reserved | – | – |
| 47H | 71 | Reserved | – | – |
Thermocouple Conversion Enable/Disable
- Setup TC conversion enable or disable for each channel.
- The initial value is thermocouple conversion disable.
- In order to save the set value to the TC module, Requesting to save set value (Yn.2) must be ON/OFF.
- The set value is stored in EEPROM and is operated by the previous set value when the power is turned ON/OFF.
| BIT 15 | BIT 14 | BIT 13 | BIT 12 | BIT 11 | BIT 10 | BIT 9 | BIT 8 | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | CH4 | CH3 | CH2 | CH1 |
- Bit 4 ~ Bit 15 are fixed to 0 by default.
- Channel 1 ~ 4 (bits 0 ~ 3) have TC conversion disabled if the bit is 0.
- Channel 1 ~ 4 (bits 0 ~ 3) have TC conversion enabled if the bit is 1.
Temperature Detection Value (°C)
- The temperature detection value stores the temperature value detected by TC conversion.
- The value stored in the memory is the actual temperature (first decimal digit × 10).
- The following are the temperature ranges for each thermocouple:
Thermocouple Temperature Ranges
| Thermocouple | Measured Temperature Range (°C) | Maximum Range of Measured Temperature (°C) |
|---|---|---|
| K | -200°C ~ 1,200°C | -250°C ~ 1,250°C |
| J | -200°C ~ 800°C | -250°C ~ 850°C |
| E | -200°C ~ 600°C | -250°C ~ 650°C |
| T | -200°C ~ 400°C | -250°C ~ 450°C |
| B | -400°C ~ 1,800°C | -350°C ~ 1,850°C |
| R | 0°C ~ 1,750°C | -50°C ~ 1,800°C |
| S | 0°C ~ 1,750°C | -50°C ~ 1,800°C |
| N | -200°C ~ 1,250°C | -250°C ~ 1,300°C |
- If the value is out of range, it is measured by the minimum -50°C and the maximum 50°C.
Thermocouple Type Setting
- In order to make the TC type available, set the bit for assigning type setup data (Buffer Memory Address 20 (14H)) to 1 and the Requesting to save set value (Yn.2) is ON/OFF.
- The initial value is set to K type.
- The set value stored in EEPROM and is operated by the previous set value when the power is turned ON/OFF.
| TC Type | K | J | E | T | R | S | B | N |
|---|---|---|---|---|---|---|---|---|
| Set Value | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Bit 15 ~ Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
|---|---|---|---|---|
| Buffer Memory Address 9 (09H) | Channel 4 | Channel 3 | Channel 2 | Channel 1 |
Temperature Detection Value (°F)
- The temperature detection value stores the temperature value detected by TC conversion..
- The temperature, in Fahrenheit, converted by the TC module is stored.
- The actual temperature (the first decimal digit × 10) is stored into memory.
Information for Operation Channel
- The information for a channel under normal conversion among conversion-enabled channels is displayed.
- The bit for disconnected channel among conversion-enabled channels is 0 while the bit for channels under normal conversion is 1.
- The bit for conversion-disabled channels store 0.
Digital Conversion Value
- The temperature measured by the TC module is stored as a digital value:
- The minimum digital value is 0 (-8,000).
- The maximum digital value is 16,000 (8,000).
- If the temperature is out of range, it is stored as -192 (-8,192) or 16,191 (8,191).
- If the user input minimum and maximum values:
- If the minimum temperature is measured, 0 (-8,000) is stored.
- If the maximum temperature is measured, 16,000 (8,000) is stored.
Digital Output Setting
- Select the following ranges as a digital output value:
- 0 ~ 16,000
- -8,000 ~ 8,000
- -192 ~ 16,191
- -8,192 ~ 8,191
- If the range -192 ~ 16,191 or -8,192 ~ 8,191 is selected, the TC module displays the minimum and maximum measured temperature for each thermocouple by 0 ~ 16,000 or -8,000 ~ 8,000.
- If the input value exceeds either range, the TC module displays -192 ~ 16,191 or -8,192 ~ 8,191.
- The initial value is set to -192 ~ 16,191.
- In order to save the set value to the TC module, Requesting to save set value (Yn.2) must be ON/OFF.
- The set value is stored in EEPROM and is operated by the previous set value when the power is turned ON/OFF.
Bit Mapping
| BIT 15 | BIT 14 | BIT 13 | BIT 12 | BIT 11 | BIT 10 | BIT 9 | BIT 8 | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | CH4 | CH3 | CH2 | CH1 |
| Buffer Memory 10 (0AH) | Buffer Memory 29 (1DH) | Digital Output Type |
|---|---|---|
| 0 | 0 | -192 ~ 16,191 |
| 0 | 1 | -8,192 ~ 8,191 |
| 1 | 0 | 0 ~ 16,000 |
| 1 | 1 | -8,000 ~ 8,000 |
Designate Average Process
- Set the average process of the TC module to enable/disable.
- The initial value for the average process of all channels is disabled.
- In order to save the set value to the TC module, Requesting to save set value (Yn.2) must be ON/OFF
- The set value is stored in EEPROM and is operated by the previous set value when the power is turned ON/OFF.
Error Code
- The error code detected by the TC module is stored
- The error is maintained before it is cleared or the power is turned OFF.
- If another error occurs before the previous error is not cleared, the newly generated error is ignored.
- The error code is a decimal number.
Error Code:
| Value | Description |
|---|---|
| 01 | Disconnection |
| 02 | If the NTC temperature exceeds its range. |
| 04 | If the measured value exceeds the minimum or maximum range |
| 100 | System error (Contact Maple Systems) |
Minimum and Maximum Temperature Input Value
- In order for the minimum or maximum set value to be effective, make sure the corresponding bit for temperature set data (Buffer Memory Address 49 (31H)) is set to 1 and the Requesting to save set value (Yn.2) is ON/OFF.
- For the minimum and maximum setting, if the minimum value input by the user is larger than the maximum value, the bit for the corresponding channel becomes 1.
- The set value stored in EEPROM and is operated by the previous set value when the power is turned ON/OFF.
- If the maximum value is smaller than the minimum value, an error occurs.
Average Time/Filter Coefficient Setting
- The average time/filter coefficient setting stores the set filter coefficient value, and the average time set value.
- The average time set value for 1 BYTE (lower WORD) is 1 ~ 255 seconds.
- The filter coefficient set value for 1 BYTE (upper WORD) is 0% ~ 70%.
- When the filter function is not used, the value is 0.
Average Time/Filter Coefficient Setting Example
- Example: if the average time for channel 1 is 2 seconds amd the filter coefficient is 50:
- H3202 (12,802) is stored into the buffer memory address 59 (3BH).
| BIT 15 | BIT 14 | BIT 13 | BIT 12 | BIT 11 | BIT 10 | BIT 9 | BIT 8 | BIT 7 | BIT 6 | BIT 5 | BIT 4 | BIT 3 | BIT 2 | BIT 1 | BIT 0 | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | H3202 12,802 |
- If the converted temperature has severe variations due to external noise, follow below:
- The width for variations for the converted temperature is limited before it is stored in buffer memory.
- The range of the setting value is 0% ~ 70%.
Example: If the temperature changes as shown in the table below: it is a value that is stored in buffer memory.
| Conversion temperature value Digital filter value | 10 | 15 | 13 | 9 | 14 | 12 | 9 | 5 | 15 |
|---|---|---|---|---|---|---|---|---|---|
| 10% | – | 14.5 | 13.2 | 9.4 | 13.5 | 12.2 | 9.3 | 5.4 | 14.0 |
| 70% | – | 11.5 | 12.0 | 11.1 | 12.0 | 12.0 | 11.1 | 9.3 | 11.0 |
Current value = current value + (previous value – current value) × filter coefficient (%) ÷ 100
Operating System Version
- The operating system version indicates the firmware version of the module.
Maximum Temperature in Changing
- The maximum temperature in changing sets the difference between the previous measurement and the current measurement for each channel and stores the difference.
- The range is 3 ~ 1,000.
- The initial value is 10.
- A low set value may cause a slow response, but high stability.
- A high set value may cause a rapid response, but low stability.
- If the temperature is not updated under rapidly changing temperature conditions, use a higher temperature than the current set value.