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Programmable Logic Controller (PLC) with Web Interface

Hardware Features:

  • MOBUS-TCP to RTU Gateway X 1,which can be used for RTU devices/meters and analog interfaces.
  • Comes with one RS-485 I/O expansion communication module, allowing for the expansion of I/O points up to 256 points.
  • The PLC itself has 8 built-in relay outputs and 8 opto-coupler inputs. It can be expanded to a maximum of 256 digital inputs (DI) and 256 digital outputs (DO).


Logic Programming Features:

  • Programmable logic controller with calendar time, holiday conditions, counters, timers, DI, and DO functions.
  • Support for calendar time and holiday condition settings.
  • Logic expressions: Supports a web-based editing interface for 64 logic expressions.
  • Logic conditions: Every hour / Every day / Every week / Calendar holiday / Timer / Counter / AND / OR / Edge event.
  • Output types: ON/OFF / One Shot / Continue Pulse / Counter / Timer
  • The actual digital output points (DO) are shared with logical virtual points, meaning that unused output points within the addressing range can be utilized as virtual points.
  • Timers: It features 8 timers, with the option to select a timing unit of 0.1 seconds or 1.0 second. The maximum value for a single timer is 255. These timers can be connected in series with other counters, enabling a maximum timer duration of up to 3000 years.
  • Counters: It possesses 8 edge-triggered counters, with a maximum value of 255 for each individual count. These counters can be linked together with other counters for usage, allowing for a maximum count that can exceed 100 million times.


Programming User Interface:

Built-in easy to program and interactive user interface

  • [ IO Expend Nodes ] 

  • [ IO Schedule ] 

  • [Schedule Setting ] 

  • [Clock ] 

  • [Holiday ] 


Case Introduction :

The above are the methods for configuring self-holding on AR-401-IO-0808R, which can be done using the traditional PLC approach.
AR-401-IO-0808R also supports edge-triggering functionality, allowing you to achieve the same actions in a simplified manner. The operational mode of both methods is identical.
Every Monday to Friday morning, the light will flash for 90 minutes. It won't execute on holidays. The flashing pattern is 0.5 seconds on and 0.2 seconds off. This example utilizes a time-triggered Cycle output.
If additional conditions are needed, they can be included in the conditional statements.
Press the Start button (DI7) to initiate the flashing, and it will continue until the Stop button (DI6) is pressed.
※Edge-triggered conditions must be set in Join4.
Press the button (DI6), and DO-2 will light up for 1.5 seconds. Press the same button (DI6) again, and the state of DO-3 will cycle between ON and OFF.
※Edge-triggered conditions must be set in Join4.
At 01 minute past every hour, Motor (DO-2) will be activated for 120 seconds and then automatically stop.
For this example, we have eight infrared devices with edge-triggered Inputs 0-7, and we want to activate corresponding Outputs 0-7 for alarm indicators. Additionally, the manager requires the on-site personnel to have manual control over whether
the corresponding alarm indicators should be activated after each infrared device trigger.

Answer: Set the output mode of 0-7 point to ON. When the condition is met for triggering, activate the output alarm indicator. The condition content is edgetriggered (^.Di), and the virtual point DO8 (&Do) must be in “on” state simultaneously
to trigger the corresponding alarm indicator. The virtual output DO8-15 can be triggered through 701Client graphical control or developed using third-party software with Modbus triggering.
To achieve a scrolling marquee-like triggering, where DO0-6 triggers in sequence and DO7 acts as the triggering condition, with the triggering effect stopping automatically from 12:00 PM to 1:00 PM and operating normally during other times.
The TIMER condition LESS:011 indicates that the TIMER will loop in cycles of 0-11 seconds.
In this example, DO0-3 are interlocked for four doors. DI0-3 correspondingly trigger DO 0-3. When any DO is activated, the triggering of corresponding DOs from other DIs will be prevented.
In this example, two timed outputs need to be configured on-site, operating with a 24-hour format throughout the year.
Condition Requirements:
   a. Pulse output of 10 seconds needs to be executed every minute.
   b. Cycle output needs to occur every day at midnight at 18:00, with an ON 0.3 seconds > OFF 0.3 seconds > ON 0.3 seconds > OFF 0.3 seconds loop for 30 minutes.


   1. Index 063 (Seconds) Timer: Set the timer for 60 seconds. The condition TMR:000 LESS:060 indicates that the timer for the 000 group cycles between 0 and 60 seconds.

   2. Index 061 (Minutes) CNT Inc (Out# 001): Set the timer for minutes. The condition TMR:000 EQUA:060 indicates that when the timer for the 000 group reaches 60 seconds, the CNT Inc (Out# 001) will increase by 1, representing 1 minute.

   3.Index 062 CNT Rst (Out# 001): Set the reset for minutes. The condition CNT:001 MORE:059 indicates that the CNT for the 001 group will reset to 0 as long as it's greater than 59.

   4.Index 059 (Hours) CNT Inc (Out# 002): Set the timer for hours. The condition CNT:001 EQUA:060 indicates that when the CNT for the 001 group reaches 60 minutes, the CNT Inc (Out# 002) will increase by 1, representing 1 hour. Index 060 CNT Rst (Out# 002): Set the reset for hours. The condition CNT:002  EQUA:024 indicates that the CNT for the 002 group will reset to 0 when it equals 24.

   5.Index 058 (Pulse 007): Set the output to pulse for 10 seconds every minute. The condition is TIMER for the 000 group equals 0. This occurs because the Timer cycles within the range of 0 to 60 seconds, causing a 10-second activation at the beginning of each minute.

   6. Index 056/57 (Cycle 006): Set the cycle output to trigger every day at 18:00, with a 0.3-second on/off unit, continuing until 18:30 in the evening.

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