Blogger Tips and TricksLatest Tips And TricksBlogger Tricks

Thursday, 22 December 2011


Judge the Error through the Indicator at the Front Panel
When error occurred for the DVP PLC, please check:


There is a “POWER” LED at the front of the MPU. When the MPU is powered On, the green LED light will be on. If the indicator is not on when the MPU is powered up and with the input power being normal, it is an indication that the PLC is out of order. Please have this machine replaced or have it repaired at a dealer near you.


Identify the status of the PLC. When the PLC is in operation, this light will be on, and users could thus useHPP or the ladder diagram to edit program and give commands to make the PLC “RUN” or “STOP”.


1. If illegitimate program is input to the MPU, or that the commands and devices of the program exceed the allowable range, the indicator will thus be blinking. In this case, the user should inquire about the errorcode from the special data register D1004 in the MPU and look it up in the Error Code Table. After the error is found and the program is revised, send the revised version to the MPU.

2. If the PLC is unable to perform function, and the LED is blinking swiftly, it indicates that 24VDC power does not supply sufficient power. Please check whether the power supply of 24VDC is normal or not.

3. When the ERROR LED is on (not blinking), it is an indication that the execution time of the program circuit has exceeded the preset time-out limit (setting of D1000). To check the program circuit or use theWDT command to improve the error status. Once program modification is completed, user can re-download the program of PLC and the ERROR LED will be off. If the ERROR LED is still keep on,please turn off the power and check if there’s any noise or any conductive invader inside the PLC.“Input” LED The On/Off signals of the input point could be displayed through the “Input” LED, or monitor the status of the input point through the device HPP monitoring function. Once the motion of the input point is valid, the LED is on. Therefore, if errors are detected via using HPP, the LED and the input signal circuits then are used to check whether the status is normal. Especially when the electronic switch of great electric leakage is utilized, the input point is usually witnessed with unexpected motions.

Output LED 

The “Output” LED is designed mainly for display the On/Off status of the output signals. When the “Output” LED is On or Off and that the loading is of an opposite motion, the following conditions should be attended to:

1. The output contact might be melted down and blocked up due to overload or load in short-circuit,   defect happened consequently under this situation.

2. If the output contact is function as undesired, be sure to check the output wiring circuit and whether the screw is tightened or not.

PLC Error Code Table

PLC Periodic Inspection

 Since the DVP series PLC does not utilize disposable components, there is thus no need to replace most of the components. However, if the output relay turns on/off frequently, or drive the large load current too often, life of the output contact will thus be decreased. Under a condition like this, periodic inspection is then needed to ensure if the contact is of the “Permanently Open” status or of the short-circuit status. Moreover, the following precautions should be noted:

1. Do not mount the DVP under direct sunlight or near any heat-radiation objects.

2. Do not install the DVP-PLC in places subject to high temperature, high humidity, excessive vibration,corrosive gasses, liquids, airborne dust and metallic particles.

3. Check periodically whether the wiring and terminals are tightened and conducted properly
Blog Widget by LinkWithin


Subscribe To Get FREE Tutorials! And More....


PLC Ladder PLC Practice Problem PLC Ladder Programming training & tutorials Free Training on PLC Ladder Programming training & tutorials PLC Ladder Logic PLC Timer SCADA Basic PLC Ladder Programming Examples Delta PLC PLC & Visual Basic Communication PLC Definition Introduction PLC Error PLC Error LED RSLinx Tutorial Types of Timers in PLC ladder logic Programming programmable Logic Controllers AB addressing ABB AC Drive AC Drive training cource Actuators Advantages and Disadvantages Addressing of Allen Bradley PLC Micrologix 1000 Addressing of Delta PLC DVP SS/ES/EX Addressing of Mitsubishi PLC FX2N Addressing of Modicon PLC Micro TSX 3722 Addressing of Siemens PLC S7 200 Advantages & Disadvantages of RTD Advantages & Disadvantages of all types Sensors Advantages of SCADA Allen Bradley PLC PWM (Pulse Width Modulation) error codes Allen Bradley SLC Controller Error Codes Ampere Voltage Ratings of circuit brakers Analog addressing Allen bradley Analog input in Allen Bradley PLC Applications of Sensors Capacitive Proximity Sensors blck diagram Capacitive proximity sensors Circuit brakers Circuit diagram of motor starter Communication Between two E1000 HMI and mitsubishi Fx2n PLC Communication between FX3U PLC and SCADA via RS485BD Configuring the DF1 Driver using RSLinx Configuring the Ethernet Driver Connection between 2 E-Terminals and FX2N PLC. DOL Motor Starter PLC logic DOP Series Human Machine Interface DVP14ss Delta HMI Delta HMI Program Download.Delta HMI Communication Cable Delta HMI and RS485 Communication Delta MMI Delta PLC Projects Delta PLC input output addressing Different types of Special motor Diffrence between PLC and DCS Ebook on Basics of Allen Bradley PLC pdf Ebook on Basics of Siemens PLC pdf Ebook on Basics of VFD PDF download Electrical maintenannce tips Electromagnetic relay Error Messages from RSLogix Emulate 500 Failsafe meaning Features of Delta HMI/MMI Following are the Free PLC Software's available from all leading brands such as Allen Bradley Free PLC Ebooks Free PLC SCADA TRAINNING & TUTORIAL Free PLC Training Full form of HART HART OSI reference model HART protocol structure HMI & ZIGBEE How Capacitive Proximity Sensors Works? How Inductive Proximity Sensor Works? How Ultrasonic Sensors Works? How to Select a Suitable Motor How to Select the Right VFD (Inverter) or AC Motor Drive Ladder Logic for AND Ladder Program for Automatic Door open close Ladder Programs for Gates List of Top Most Widely used PLC’s in the Industry List of Widley used PLC Companies. Low cost Wireless I/O’s using PLC Mitsubishi Mitsubishi PLC FX2N & HMI E1000 Networking using BDTP Technology Mitsubishi PLC input output addressing Modbus Communication Modbus Ethernet Modbus Serial Modbus.dll for Visual Basic Mormally open Contact Normally Close Contact Explained Motion Actuators Motor starter in control circuit NAND NO NC Explained NOR Gates with Truth Tables Nashik Nexgenie PLC Features Nexgenie PLC Port Nexgenie PLC input output OFF Delay Timer OLE for Process and Control ON Delay Timer OR Omron On line Ladder Program Editing for RSLogix 500 On line Ladder changes Online Editing Ladder Program Online Servo tuning PID Control Instruction PID PLC PID instruction in Allen Bradley PLC PLC & VB PLC Counter PLC Error Allen Bradley PLC Error messages in Allen Bradley PLC FBD PLC Fault PLC Industrial Automation Training Institute PLC ON Delay Timer PLC Run Led PLC SCADA Communication PLC SCADA DCS Training Centers PLC SCADA Driver PLC SCADA Training Chennai PLC and ZIGBEE PLC application PLC based Automated Guided Vehicle PLC based Final year Project PLC based Line follower robot PLC based Project Report PLC functional Block Diagram PLC input wiring PLC interview Question PLC interview questions PLC maiintence PLC power LED PLC program for star delta starter PLC retentive timer PLC training in Delhi PLC training in Mumbai PLC training in Pune PTO Allen Bradley PTO [Pulse Train Output] Instruction in Allen Bradley PLC Photoelectric Sensor Applications Photoelectric Sensor Applications in Automation industry Power cable Selection Proficy HMI/SCADA Cimplicity 8.1 Programming Languages for PLC Proximity sensor application Push to ON PUSH to OFF PLC program using NO NC and Coil Pwm RSLinx Tutorial | Configuring the DF1 Driver RSLinx Tutorial | Configuring the Ethernet Driver Scaling Analog Input using SCL Instruction in PLC [Scale Data] Schneider Schneider PLC addressing Selction of Servo Motor Selction of Stepper Motor Selection of AC Motor Selection of VFD Selection of stepper or Servo Motor Sensor applications Servo Motor Servo auto tuning Parameters Siemens Siemens input output addressing Signal Cables selection Simatic Wincc SCADA Single Push button to on and off motor Sinking and sourcing operations Softwares used in SCADA Solid State Relay construction Solid State Relay uses and Advantages Sourcing and Sinking Concept in PLC Standard Wiring Color Codes Stepper Motor Applications and Advantages Disadvantages Stepper application Stepper motor Selection Stepper motor and PLC Tag in SCADA Temperature sensors used with PLC Theory of Capacitive Proximity Sensors Theory of Ultrasonic Sensors Theory or Operation of Inductive Proximity Sensors Thermistor & Temp IC Sensors Thermocouple Trial Run of PLC Troubleshooting Allen Bradley PLC with RSLogix Emulate 500 Troubleshooting Tips for Electrical /Electronic Maintenance Tutorial on PLC Types of Actuators Types of Actuators used for Motion in Automation with Advantages & Disadvantages Types of Sensors Types of Timers in PLC | ON Delay Timer (TON) Typical circuit diagram of Star Delta starter Ultrasonic Sensor Applications Ultrasonic sensors Unitronics VB 6.0 and PLC VIsual Basic as SCADA What is HART What is SCADA (Supervisory Control And Data Acquisition) What is SMART Communication What is a PLC ? What is DCS? What is the difference between PLC and Microcontroller? XIO [Examine if Open] & XIC [Examine if Closed] Explained advantages & disadvantages of Servo Motors anlog input addressing DELTA PLC anlog input addressing Mitsubishi PLC anlog input addressing siemens automation training comparison of PLC and DCS connecting field devices to Programmable Logic Controllers contact reting of relay design of fail safe systems digital common ground connections distributed control system drawbacks of Servo Motor fail safe PLC Redundancy modbus examples noise in cables one input one output PLC program using NO NC logic opc overload relay operation photoelectric plc Response Time plc output wiring plc program for TV remote plc training programmable Logic Controllers List relay coil rating relay driving circuit relay isolation voltage selection of relay servo basics servo training star delta starter control wiring diagram types of Counter typical circuit diagram of Direct on line starter