1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the GODIYMODULES Digital Display Meter, Standard Edition. This universal analog input display meter is designed to work with various sensors that provide analog output, such as temperature transmitters, frequency converters, motor speed sensors, pressure transducers, and liquid level sensors. Please read this manual thoroughly before operating the device to ensure correct usage and optimal performance.
2. Product Overview
The GODIYMODULES Digital Display Meter is a versatile panel meter capable of displaying actual physical quantities based on analog input signals. It supports both current and voltage inputs, with default adaptations for 0-10V, 2-10V, 0-20mA, and 4-20mA. The meter features a 0.55-inch 4-digit digital tube display for clear readings and intuitive button controls for parameter settings.
Figure 2.1: Front view of the GODIYMODULES Digital Display Meter, showing the digital display and control buttons.
3. Key Features
- Universal Analog Input: Compatible with 0-10V, 2-10V, 0-20mA, and 4-20mA signals. Adaptable to other ranges via polarization and gain parameters.
- Wide Power Supply Range: DC6~25V for standard and RS485 versions; DC8~25V for relay output version.
- Power Protection: Features anti-reverse connection and surge protection.
- Single Analog Input: Supports either voltage or current input.
- Input Impedance: >30kΩ for voltage type, <250Ω for current type.
- Clear Display: 0.55 inch, 4-digit digital tube display.
- Easy Parameter Setting: Built-in buttons for convenient configuration.
- Compact Design: Mechanical size of 79 x 43 x 25 mm, with an installation opening of 76.5 x 39.5 mm.
- Optional RS485 Interface: (Available in RS485 version) Supports Modbus-RTU protocol for multi-meter communication.
- Optional Relay Output: (Available in relay output version) One normally open relay output, load capacity: 3A30VDC/3A250VAC.
4. Setup
4.1. Mechanical Installation
The meter is designed for panel mounting. Ensure the installation opening in your panel matches the specified dimensions.
- Mechanical Size: 79 mm (Length) x 43 mm (Width) x 25 mm (Depth)
- Installation Opening: 76.5 mm (Length) x 39.5 mm (Width)
Figure 4.1: Top angled view of the meter, illustrating the physical form factor and button layout.
Figure 4.2: Another angled view of the meter, providing a clearer look at the control buttons and terminal block.
4.2. Wiring Instructions
Refer to the common wiring diagram for proper connection of power supply and analog input. Ensure the power supply voltage is within the specified range to prevent damage.
Figure 4.3: Back view of the meter showing the wiring diagram for power, ground, and analog input terminals.
Terminal Descriptions:
- PWR: Positive power supply input (DC6~25V for standard/RS485, DC8~25V for relay version).
- GND: Ground connection for power supply and analog input.
- AI: Analog Voltage Input (0-10V, 2-10V).
- mA: Analog Current Input (0-20mA, 4-20mA).
- NC: Not Connected.
- RS485 (R, T, S): For RS485 communication (available in RS485 version only). R indicates data reception, T indicates data transmission, S indicates signal ground.
- Relay (NO): Normally Open relay output (available in relay output version only).
Important: The meter supports either voltage input (AI) or current input (mA), but not both simultaneously. Connect your sensor output to the appropriate terminal.
5. Operating Instructions
5.1. Button Functions and Display States
The meter features four buttons for navigation and parameter adjustment: SET, UP (↑), DOWN (↓), and OK. The 4-digit digital display shows the measured value or parameter settings.
Button Functions:
- SET: Enters parameter setting mode or cycles through parameter groups.
- UP (↑): Increases value or navigates up in menus.
- DOWN (↓): Decreases value or navigates down in menus.
- OK: Confirms selection or saves parameter changes.
Digital Tube Display State Transition Diagram:
The meter typically displays the measured value. Pressing the SET button allows entry into the parameter setting menu. Use UP/DOWN to navigate and OK to select/confirm. Pressing SET again will exit the parameter setting mode or move to the next parameter group.
5.2. Parameter Settings
The meter's functionality is configured through various parameters organized into groups. To enter the parameter setting mode, press the SET button. Use the UP and DOWN buttons to adjust values and OK to confirm. Press SET to move between parameters or exit.
5.2.1. F0-0 Displayed Quantity Collection Parameters
| Parameter | Scope and Description | Defaults | Read/Write |
|---|---|---|---|
| F0-0 | Displayed value monitoring: Displays the current collected value. Range: 0-100.0% | 0.0 | Read only |
| F0-1 | Display accuracy: The number of decimal places displayed in the collected value. Range: 0-3 | 1 | Read/Write |
| F0-2 | Show minimum: The minimum value corresponding to "acquisition value" 0%. Range: -9999 to 9999 | 0 | Read/Write |
| F0-3 | Show maximum: The maximum value corresponding to the "acquisition value" is 100%. Range: -9999 to 9999 | 1000 | Read/Write |
| F0-4 | Display range: The display range is F0-2 to F0-3. Starting from F0-2. | 0 | Read/Write |
Note: The displayed value is a default percentage. You can set your own display range using F0-2 to F0-4.
5.2.2. F1-0 Parameter Group Configuration Parameters
| Parameter | Scope and Description | Defaults | Read/Write |
|---|---|---|---|
| F1-0 | Input type selection: 0: 0-10V or 0-20mA (corresponds to 0-100% of the acquisition value). 1: 2-10V or 4-20mA (corresponds to 0-100% of the acquisition value). | 0 | Read/Write |
| F1-1 | Input filter time: The filtering time for the input signal. Range: 0-1000ms. | 200 | Read/Write |
| F1-2 | Input offset: The offset value for the input signal. Range: 0-100.0% | 0.0 | Read/Write |
| F1-3 | Input gain: The gain value for the input signal. Range: 0-100.0% | 100.0 | Read/Write |
| F1-4 | Drop detection threshold: If the input value is not detected, the display will show "----". This parameter sets the threshold for detection. If the input value is less than this threshold, it is considered not detected. Range: 0-100.0% (Starting from V0.10) | 0.0 | Read/Write |
Note: By setting the polarization parameter (F1-2) and gain parameter (F1-3), the meter can be adapted to other input ranges within 0-10V or 0-20mA.
5.2.3. F2-0 Parameter Group Relay Output Parameters (for Relay Output Version)
| Parameter | Scope and Description | Defaults | Read/Write |
|---|---|---|---|
| F2-0 | Relay output: 0: Normally open, 1: Normally closed. | 0 | Read/Write |
| F2-1 | Condition type: 0: Greater than comparison value 1, 1: Less than comparison value 1, 2: Greater than comparison value 2, 3: Less than comparison value 2. | 0 | Read/Write |
| F2-2 | Comparison value 1: The value used for comparison. Range: 0-100.0% | 50.0 | Read/Write |
| F2-3 | Comparison value 2: The value used for comparison. Range: 0-100.0% | 0.0 | Read/Write |
| F2-4 | Hysteresis interval: The hysteresis value to prevent frequent relay operation. Range: 0-100.0% | 5.0 | Read/Write |
| F2-5 | Relay status when offline: 0: Keep current status, 1: When the offline value is less than the comparison value, the relay is closed, 2: When the offline value is greater than the comparison value, the relay is closed. | 0 | Read/Write |
Note: These parameters are only applicable to the version of the meter equipped with a relay output. The Standard Edition may not include this feature.
5.3. RS485 Communication Parameters (for RS485 Version)
This section applies only to the Digital Display Meter with RS485 interface. It uses the standard Modbus-RTU protocol for communication.
Figure 5.1: Comprehensive parameter tables including F0, F1, F2, and RS485 communication settings.
| Parameter | Scope and Description | Defaults | Read/Write |
|---|---|---|---|
| F7-0 | Local address: The address of the meter in the Modbus network. Range: 1-247 | 1 | Read/Write |
| F7-1 | Baud rate: 0: 1200bps, 1: 2400bps, 2: 4800bps, 3: 9600bps, 4: 19200bps, 5: 38400bps. | 3 | Read/Write |
| F7-2 | Data format: 0: 8N1 (8 data bits, 1 stop bit, no parity), 1: 8E1 (8 data bits, 1 stop bit, even parity), 2: 8O1 (8 data bits, 1 stop bit, odd parity), 3: 8N2 (8 data bits, 2 stop bits, no parity). | 0 | Read/Write |
| F7-3 | Response delay: The delay time before the meter responds to a Modbus query. Used to prevent bus collisions in half-duplex communication. Range: 0-100ms. | 5 | Read/Write |
| F7-4 | Communication type: 0: The display table is in the network host mode, 1: The display table is in the network slave mode, 2: The display table through the broadcast mode. | 0 | Read/Write |
| F7-5 | Parameter interval: The interval time for the meter to send parameters. Range: 0-1000ms. | 100 | Read/Write |
| F7-6 | Send recovery time: The time for the meter to send recovery parameters. Range: 0-1000ms. | 100 | Read/Write |
| F7-7 | Software version number: Displays the current software version. | 1.00 | Read only |
Modbus-RTU Protocol Details:
The meter supports standard Modbus-RTU protocol. The communication parameters (address, baud rate, data format) must be configured correctly to match the master device. The image also shows a table of Modbus register addresses for various parameters (e.g., F0-0, F0-1, F1-0, etc.) which can be read or written via Modbus commands.
For detailed Modbus register addresses and functions, refer to the provided diagram (Figure 5.1) or the official Modbus communication guide for this device. Example: To read F0-0, use Modbus function code 03 (Read Holding Registers) with the corresponding address.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the meter's display and casing. Do not use abrasive cleaners or solvents.
- Environment: Ensure the meter is operated within its specified environmental conditions (temperature, humidity) to prolong its lifespan.
- Connections: Periodically check all wiring connections for tightness and ensure they are free from corrosion.
- Calibration: If accuracy issues are suspected, refer to the parameter settings for input offset and gain adjustment, or consult a qualified technician for recalibration.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | No power supply or incorrect voltage. | Check power connections and ensure voltage is within DC6~25V (or DC8~25V for relay version). |
| Display shows "----". | No analog input signal detected or signal below F1-4 threshold. | Verify sensor connection and output. Check F1-4 (Drop detection threshold) setting. |
| Incorrect readings. | Incorrect input type (F1-0), offset (F1-2), or gain (F1-3) settings. Sensor malfunction. | Review F1-0, F1-2, F1-3 parameters. Check sensor calibration and output. |
| RS485 communication failure. | Incorrect RS485 parameters (F7-0 to F7-4). Wiring issues. | Verify F7-0 (Local address), F7-1 (Baud rate), F7-2 (Data format) match the master device. Check RS485 wiring (R, T, S). |
8. Specifications
| Brand | GODIYMODULES |
| Model | Standard Edition |
| Input Signal Types | Voltage (0-10V, 2-10V), Current (0-20mA, 4-20mA) |
| Power Supply (Standard/RS485) | DC6~25V |
| Power Consumption (Standard/RS485) | 24V/40mA |
| Power Supply (Relay Output Version) | DC8~25V |
| Power Consumption (Relay Output Version) | 24V/50mA |
| Input Impedance (Voltage Type) | >30kΩ |
| Input Impedance (Current Type) | <250Ω |
| Display | 0.55 inch, 4-digit digital tube |
| Mechanical Size | 79 x 43 x 25 mm |
| Installation Opening | 76.5 x 39.5 mm |
| Weight | 50 g |
| RS485 Protocol (Optional) | Modbus-RTU |
| Relay Output (Optional) | 1 Normally Open, 3A30VDC/3A250VAC |
