蓝色表示可用空间，左边是内核使用，右边是程序可用，内核使用量一般很少
详细的英文说明如下：
TwinCAT, R3IO Applications and so on will all use the Program Memory. TwinCAT PLC will use it statically (allocates the memory one time at startup), R3IO Applications will use it dynamically (allocates the stack on startup and further memory in the heap with new/delete).
1.) TwinCAT Memory:
Because the PLC has no dynamic memory, you have to declare the size of the provided static memory. This static memory is divided into several areas for several use cases. If you define the input memory to 16 kBytes, your input data is able to become up to 16 kBytes. If you have too much variables declared as an input, maybe your memory is not enough and you need to increase the size of input memory. In your case it seems the amount of memory for the internal variables has been exceeded and you need to increase the defined memory size.
2.) Storage Memory:
The Storage Memory is something like a temporary hard disk. After boot the operating system would install to this temporary memory. It’s usable with the explorer like a normal hard disk: read, write, create files, manipulate them and so on. The more storage memory available to the device, the more personal information you will be able to store without resorting to external storage cards.
2.) Program Memory:
The Program Memory is mostly similar to the traditionally described RAM. It provides memory for the heap and stack of programms which are running on the system. Every program you run, every task or action or information on the screen, will be store in the program memory. The more Program Memory is available to the system, in general the faster it will perform and the more responsive it will be.