Difference between V zone and M zone of Siemens 200 - News - Global IC Trade Starts Here Free
Q: Is there a lot of bool variables, is it in V or M? Answer: V and M basically have the same function, but the memory area of ​​V is large, so the analog value and the intermediate amount are generally stored in V, and the M area is generally used in the middle of the digital relay. 1, V and M have no deterioration, the status is almost interchangeable; 2. V is more and M is less. Less M can make the instruction code shorter, and the storage and execution efficiency is improved. 3, M has some provisions for use, such as MB0-MB13 if set to maintain, when the power is off, it is directly written eeprom, is a permanent type of retention, except that the hold is temporarily maintained by a super capacitor or battery . 4, V capacity is large, the use of V is longer than using the M command code, of course, the time is also a bit. The same V area, I found that there are also partitions, V0-V511 is a piece, the corresponding instruction code is shorter than V512, but there is no difference in execution time, no research. Therefore, the V variable that is often used should be placed before V511 to shorten the length of the instruction code. 5, V and M due to the difference in symbols, it is customary to classify their use, such as M is mainly used as a bit variable, so the program is more readable Used in glass window, glass curtain wall, indoor large space display, stage performance, glass plank road, glass suspension bridge, time tunnel, LED sky curtain, etc.China Call Indicator Screen,Led Call Indicator Screen supplier & manufacturer, offer low price, high quality Led Calling Number Film Screen,Call Indication Transparent Screen, etc. Call Indicator Screen,Led Call Indicator Screen,Led Calling Number Film Screen,Call Indication Transparent Screen Guangdong Rayee Optoelectronic Technology Co.,Ltd. , https://www.rayeeled.com
The data in the V zone has the power-off protection function. The data power-off protection range of the M zone needs to be set to be larger than the v zone, and the power-down can be saved. Other functions are similar to m.