Lilytech ZL-7817A - User Manual

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Suzhou Lily Tech. Co., Ltd.

Page 1, Total 4 Pages

ZL-7817A Temperature Controller

Instruction Manual V1.2b

Introduction

This new version provides optional PID and on/off control.

Internal control resolution now is 0.01C degree to reach better control

result.

Integrated SSR output with 5A rate power driving ability.

An auxiliary output: timer on/off, and/or high temperature protection

Specification

Sensor: NTC, R

℃

= 10K, B

25/50

℃

= 3470K

Setting range: -40.0 ~ 130.0℃

Power supply: 100 ~ 240Vac, 50/60Hz

Output R1: 5A, 250Vac (rated current)

Output R2: 7A, 250Vac (resistive)

Working: -10 ~ 45℃, 5 ~ 85%RH without dew

Case materials: PC + ABS fire proof

Protection level: IP65 (Front side only)

Dimension: W78 x H34.5 x D71 (mm)

Installation drilling: W71 x H29 (mm)

Display

Function

Blinking

Heater status

Heater output R1 is energized

Timer output status

Timer output R2 is energized

PID auto tune status

PID auto tuning

Failure

Warning

Set status

Setting

Failure

Sensor failure

Failure

High temperature warning

Failure

Low temperature warning

Failure

External warning input effective

UnL

Restore to factory settings

Will restore to factory settings

At1

Auto tuning fails

Temperature not stable during Auto tuning

At2

Auto tuning fails

Temperature vibration level not satisfied

At3

Auto tuning fails

Temperature vibration period not satisfied

SUc

Auto tuning finished

Auto tuning finished successfully

Model, version display

After reset, the model (ZL-7817 A) and version (version 1.0) will display

consecutively:

Operation

Set set-point (SP). Factory default set is 35.0℃

Keep〖S〗depressed for 3 seconds to enter into temperature setting status:

blinks, the SP value displays.

Press〖▲〗or〖▼〗to set the value.

Press〖S〗to save and exit the status.

The status will exit, and the value will be saved, when there is no key operation for 30 seconds.

Need help?

Do you have a question about the Lilytech ZL-7817A and is the answer not in the manual?

The ZL-7817A is a temperature controller designed for precise temperature management, offering both PID and on/off control methods. It features an internal control resolution of 0.01°C, ensuring high accuracy. The device includes an integrated Solid State Relay (SSR) output with a 5A rated power driving ability for heating control (R1), and an auxiliary output (R2) with a 7A resistive rating for timer-based operations or high-temperature protection.

Function Description:

The ZL-7817A primarily functions as a temperature controller. It can operate in two control modes:

PID Control (U74 = 0): This mode provides proportional, integral, and derivative control for precise temperature regulation, minimizing overshoot and maintaining a stable set-point. The output for the heater is R1.
Hysteresis Control (U74 = 1): In this mode, R1 de-energizes when the measured temperature is greater than or equal to the set-point (SP) and energizes when the measured temperature is less than or equal to SP minus the hysteresis value (U14). This is a simpler on/off control method suitable for applications where precise PID control is not critical.

The auxiliary output (R2) can be configured for:

Timer Output: R2 energizes during a user-defined "on" period (U41, U40) and de-energizes during an "off" period (U43, U42). The time units can be set to seconds, minutes, or hours.
Over Temperature Protection: When enabled (U46 = 1 or 2), R2 energizes if the measured temperature reaches or exceeds the high-temperature warning point (SP + U13).
Combined Timer and Over Temperature Protection: R2 can operate with both functions simultaneously.

The device also incorporates several warning and protection features:

Low/High Temperature Warning: The display blinks and the buzzer beeps if the measured temperature falls below the low-temperature warning point (SP - U12) or rises above the high-temperature warning point (SP + U13).
External Input Warning: An external input (U60) can be configured as normally open or normally closed. If triggered, R1 de-energizes, and R2 continues to operate.
Sensor Failure Warning: If the sensor fails (open or short circuit), the display blinks, the buzzer beeps, R1 de-energizes, and R2 continues to operate.
Auto Tuning: The controller can automatically tune PID parameters (Kp, Ti, Td) to optimize control performance for a specific system. This involves setting a driving power rate (U73) and initiating the auto-tuning process, during which the temperature will oscillate around the set-point until optimal parameters are found.

Important Technical Specifications:

Sensor: NTC, R25°C = 10K, B25/50°C = 3470K.
Setting Range: -40.0 ~ 130.0°C.
Power Supply: 100 ~ 240Vac, 50/60Hz.
Output R1 (Heating): 5A, 250Vac (rated current).
Output R2 (Auxiliary): 7A, 250Vac (resistive).
Working Environment: -10 ~ 45°C, 5 ~ 85%RH (non-condensing).
Case Materials: PC + ABS fire proof.
Protection Level: IP65 (Front side only).
Dimension: W78 x H34.5 x D71 (mm).
Control Resolution: 0.01°C.
Sensor Calibration Range (U30): -20.0 ~ +20.0°C.
PID Parameters:
- Kp (U70): 0.1 ~ 999.9 (default 2.6).
- Ti (U71): 0 ~ 999.9 (default 500).
- Td (U72): 0 ~ 999.9 (default 50).
- PID Output Amplitude (U73): 10 ~ 100% (default 50%).
Hysteresis (U14): 0.0 ~ 20.0°C (default 0.2°C, effective only when U74 = 1).
Timer Periods: 1 ~ 9999 units (seconds, minutes, or hours).

Usage Features:

Intuitive Display: The device features a clear digital display that shows the current temperature (PV), set-point (SP), and various status indicators (e.g., heater status, timer status, auto-tune status, failure warnings). Blinking indicators signify active warnings or settings.
Easy Set-point Adjustment: The set-point (SP) can be easily adjusted by pressing and holding the 'S' button, then using the up/down arrows to change the value, and pressing 'S' again to save.
System Parameter Configuration: Accessing system parameters (U10 to U99) involves pressing and holding the 'P' button. Users can navigate through parameters, view their values, and adjust them using the up/down arrows. A password (U99) can be set to restrict access to these parameters.
Auto Tuning Functionality: The auto-tuning feature simplifies the process of optimizing PID parameters, making it easier for users to achieve stable and accurate temperature control without manual trial and error.
Buzzer Control: The buzzer sounds during failures or warnings and can be silenced by pressing the 'P' button.
Model and Version Display: Upon reset, the device displays its model (ZL-7817A) and version (e.g., 1.0) consecutively.

Maintenance Features:

Sensor Calibration (U30): The sensor can be calibrated to compensate for any inherent tolerance, improving the absolute sensing accuracy to within 0.1°C.
Restore to Factory Settings: The device can be easily reset to its factory default parameters by simultaneously pressing and holding the 'P' and '▲' buttons for 5 seconds, then confirming the action. This is useful for troubleshooting or reconfiguring the controller.
Wiring Guidelines: The manual provides clear instructions for proper wiring, emphasizing the importance of using certified technicians, avoiding wrong connections, and separating sensor wires from power supply wires to prevent electrical noise.
Load Management: Specific guidelines are provided for connecting different types of loads (AC/DC modules, tungsten lamps, motors) to prevent damage to the controller outputs due to surging currents. For instance, the rated current for tungsten lamps should not exceed 1/15th of the output specification under pure resistance.
Environmental Considerations: Recommendations are given for avoiding installation in environments with high humidity, vibrations, corrosive air, or explosive atmospheres to ensure the longevity and reliable operation of the controller.
Manual Tuning Principle: For advanced users, the manual explains how to manually adjust PID parameters (Kp, Ti, Td) to fine-tune control behavior, such as increasing Kp for faster control (but potentially more overshoot) or increasing Ti for greater accuracy (but longer stabilization time).