Evaluation of the WIS-MKR1010-A1 PLC performance and time response

Technical analysis of the Weidos-MKR1010-A1 PLC pinout performance
December 29, 2023 by
Evaluation of the WIS-MKR1010-A1 PLC performance and time response
Boot & Work Corp. S.L., David Coronado

Introduction

In this post, we will examine the time response characteristics of the various pin types of the Weidos-MKR1010-A1 Programmable Logic Controller. We will see aspects like the maximum switching frequency and the rising or falling times, which are crucial for functions  such as interacting with external peripherals.

Requirements

If you want to measure the PLC characteristics, you will also need a precise oscilloscope capable of reading at the 100ns scale.


Technical specifications

The PLC WEIDOS-MKR1010-A1 features 36 pins dedicated to various purposes, and we will now analyze some of them. Among all its pins, 4 are allocated for digital inputs (25-28), and 4 for analog inputs (15-18), which can also be used as digital inputs. It has 4 digital outputs (55-58) and one analog output (45). Finally, we will also assess the 2 multifunction pins (41-42) available on the PLC. 

The digital input pins operate with a voltage of 5 or higher for HIGH values and 3.3 or lower for LOW values. Digital output pins provide a maximum voltage of the supply voltage minus 1V. Analog input pins work within the range of 0 to 10V. Analog output pins deliver a range of 0 to 10V. Multifunction pins operate based on the microswitch configuration at either 3.3V or 5V.

For more information, please refer to the documentation here.


Data collection

Below, all the extracted data is presented. It's important to remember that these data are approximations obtained in the laboratory, implying that it is very likely that your device, if it is the same, has similar or identical times. Nevertheless, later on, an explanation will be provided on how these data have been obtained.

Signal transition time

Output (pin n.º)
Rise time
Fall time
Signal frequency - Maximum
Stable

Signal frequency - Maximum 
Digital (55)770 - 900 ns20 µs704.2 Hz-
Analog (45)60 ms70 ms2.5 Hz6.6 Hz
Multifunction (41)600 - 900 ns1.6 µs25 Hz50 Hz
Response time

Input type (pin n.º)

Output type (pin n.º)

Internal measurement (Script)

External measurement (Osc.)

Digital (25)

Digital (56)

706 µs706 µs

Digital (25)

Analog (45)

6 µs75 ms
Analog (15)

Digital (56)

1.55 ms-

Analog (15)

Analog (45)

859 µs-

Sampling time

Input type (pin n.º)

Sampling frequency - Average

Sampling frequency - Highest read time

Digital input (25)

346 KHz (2.98 µs)83.33 KHz (12 µs)

Analog input (15)

1.167 KHz (856.5 μs)1.15 KHz (870μs)
Analog input (used as digital) (15)
333.33 KHz (3 µs)

83.33 KHz (12 µs)

Multifunctional digital input (41)

225.73 KHz (4.43 µs)

71.43 KHz (14 µs)

Multifunctional analog input (41)

113.9 KHz (8.78 µs)

55.55 KHz (18 µs)

Output type (pin n.º)

Sampling frequency - Average

Sampling frequency - Highest read time

Digital output (55)

1.42 KHz (704.3 µs)

71.43 KHz (714 μs)

Analog output (45)

225.73 KHz (4.43 µs)

71.43 KHz (14 µs)

Multifunctional digital output (41)

224.72 KHz (4.45 µs)

71.43 KHz (14 µs)

Multifunctional analog output (41)

114.15 KHz (8.76 µs)

55.55 KHz (18 µs)


Pin Evaluation: Performance and Timing Analysis


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Evaluation of the WIS-MKR1010-A1 PLC performance and time response
Boot & Work Corp. S.L., David Coronado December 29, 2023
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