S7-200 CPU module provides 5VDC and 24VDC power supply:When an expansion module CPU through I / O bus to provide 5V power supply, all the expansion module 5V power consumption of the CPU and can not exceed the rated power provided. If not enough external 5V power supply. Each CPU has a 24VDC sensor power … Continue reading How Siemens S7-200 series PLC’s power requirements and calculation?
Tag: plc basics
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
Three types of Siemens industrial control software introduction
Siemens industrial software is divided into three different categories:(1) programming and engineering tool for programming and engineering tool includes all PLC-based or PC for programming, configuration, simulation and control tools needed maintenance. STEP 7 standard package SIMATIC S7 for S7-300 / 400, C7 PLC and SIMATIC WinAC PC-based control product configuration programming and maintenance of … Continue reading Three types of Siemens industrial control software introduction
Through the program determines the touch screen and plc communication failure method
The usual method is to use heartbeat, defined a bool, HMI fixed point set the frequency, PLC receives the point after ON signal is reset. If a period of time, for example, do not receive the points for the ON signal within 5s, it is considered Tongxu interrupted.plc to the memory clock of bytes transmitted … Continue reading Through the program determines the touch screen and plc communication failure method
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)
What is the difference between circuit and magnetic circuit
What is a circuit?EMF (voltage) under the path of the currents flowing through the circuit. Usually consists of a power supply, load and switch it into three parts. The magnitude and direction of the current flowing through the circuit the circuit does not change with time, called the DC circuit. The magnitude and direction of … Continue reading What is the difference between circuit and magnetic circuit
What is a PLC? PLC What does it mean?
Many beginners to abbreviation (PLC) to worry about. PLC is what, what is a PLC? What does PLC mean?Is actually very simple, official definitions of same, I understand. What's PLC? PLC is an intelligent controller, is a computer (PC). PLC is a programmable logic controller. PLC programmable controller is: English universal Programmable Logic Controller PLC, … Continue reading What is a PLC? PLC What does it mean?
Difference of thermocouple and thermal resistance
Thermocouple and RTD are contactless temperature measurement of temperature measurement, although its the same, it is measuring the temperature of a body, but their principles and characteristics are different.First of all, introduce the thermocouple. The temperature of thermocouple temperature measurement is the most widely used devices, whose main features are wide temperature range, stable performance, … Continue reading Difference of thermocouple and thermal resistance
Siemens S7-300 plc can extend several racks
Siemens S7-300PLC 3 racks can be extended, count of CPU unit No. 0, altogether 4 rack, 32 modules, right? I have a question, can I extend 4 rack, rack, count the No. 0/5, with 20 modules? 4 153 connection 5 rack, can you?Siemens S7-300plc 1, mainly to see what type of CPU. Different CPU's ability … Continue reading Siemens S7-300 plc can extend several racks
Difference between Simens PLC S7-200 and S7-300
Hardware differencesS7-300 in order to meet the large and middle scale control system, and design more modular. S7-200 series is integral, CPU module, the I/O module and the power supply module in a module, called CPU modules and S7-300 series, from the power supply, I/O,CPU and the rail is a separate module.Actually S7-200 series can … Continue reading Difference between Simens PLC S7-200 and S7-300
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