Omron PLC data typeBOOLAddress of a binary bit - a logical Boolean on or off state. This type is typically used for contacts or coils.CHANNELThis is a special data type, for backward compatibility. It is an address (non-bit) to data of any type (unsigned or signed, one or more words), so can be used in place of any … Continue reading Omron PLC data type
Tag: plc courses
Siemens S7-200PLC Counter Area (C)
In the S7-200 CPU, the counter for the accumulated number of pulses from the input terminal or internal components sent. It has up counter, down counter and up / down counter 3 types.Due to limitations counter frequency scan cycle, when the need for high-frequency signal can be counted when a high frequency counter (HSC).There are … Continue reading Siemens S7-200PLC Counter Area (C)
Siemens S7-200 PLC local variable storage area (L)
Local variables and variable storage memory is very similar, the main difference is that the local variables memory is partially valid, the variable memory is globally effective.Globally effective refer to the same memory can be used by any program (such as main program, an interrupt routine or subroutine) access to local storage areas and effective … Continue reading Siemens S7-200 PLC local variable storage area (L)
Siemens S7-200 series PLC analog input (A1)
S7-200 converts an analog value (such as temperature or voltage) into a word-length (16-bit) digital value.You can use the area identifier (AI), the data length 
and the starting byte address to access these values.Since analog inputs of a word, and the even-number bytes (such as 0,2,4) started, it must be an even number byte … Continue reading Siemens S7-200 series PLC analog input (A1)
What is the difference S7-200 PLC system operating temperature
s7-200 PLC work at minus 20 degrees?S7-200 working environment requirements:0 ° C-55 ° C, horizontal installation0 ° C-45 ° C, vertical mounting95% relative humidity, non-condensingSiemens also offers a wide temperature range S7-200 product (SIPLUS S7-200):Operating temperature range: -25 ° C- + 70 ° CRelative Humidity: 55 ° C at 98%, 70 ° C 45%Other parameters … Continue reading What is the difference S7-200 PLC system operating temperature
PLC ladder programming principles and programming methods
(1) Input / output relay, internal auxiliary relays, timers, counters and other devices of the contact can be used repeatedly, without complex program structure to reduce the use of contacts. (2) Each line ladder left the bus started, the coil terminates at the right bus. Contacts are not on the right side of the coil, … Continue reading PLC ladder programming principles and programming methods
how to Learn Mitsubishi PLC ladder programming
Beginner PLC ladder programming should be to follow certain rules, and develop good habits. In this paper, Mitsubishi FX series PLC, for example, briefly explain the Mitsubishi PLC ladder programming rules to be followed, allowing users to better understand how to learn to see the Mitsubishi PLC ladder programming, we want to help. One thing … Continue reading how to Learn Mitsubishi PLC ladder programming
PLC conduction delay timer instruction (TON)
When the limit switch 1 is set, the indicator 2 ON 180ms (timer clocked). When the accumulated value of the timer 1 (.ACC) reaches 180, 2 lights off, the indicator 3 is turned on, and remains on until the TON instruction is disabled. If you disconnect the timer is timing the limit switch 1, then … Continue reading PLC conduction delay timer instruction (TON)
STEP7-Mirco/WIN software project management
1 print (1.) printing method of program and project documentsPrint program and project documents in the following way:Click the "print" button.Select the menu command "file" then "print".Press the CTRL + p shortcut key combination.(2). network and print a single itemFollowing a single block printed a series of network, or from a single symbol table or figure … Continue reading STEP7-Mirco/WIN software project management
Siemens S7-200 PLC high-speed counter instruction Initialization
High speed counter instruction is initialized as follows:(1) first scans through a special internal memory scanning cycle SM0.1 to call a subroutine to complete initialization. Because the use of subroutines, in subsequent scans, no need to call this subroutine, to reduce the scanning time, make the program better.(2) in initial of of child program in … Continue reading Siemens S7-200 PLC high-speed counter instruction Initialization
PLC ONE 